diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/MainActivity.kt b/app/src/main/java/pl/szczodrzynski/edziennik/MainActivity.kt
index 8fdc45c1..d1faa9d2 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/MainActivity.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/MainActivity.kt
@@ -45,6 +45,7 @@ import pl.szczodrzynski.edziennik.network.ServerRequest
 import pl.szczodrzynski.edziennik.sync.AppManagerDetectedEvent
 import pl.szczodrzynski.edziennik.sync.SyncWorker
 import pl.szczodrzynski.edziennik.ui.dialogs.changelog.ChangelogDialog
+import pl.szczodrzynski.edziennik.ui.dialogs.error.ErrorSnackbar
 import pl.szczodrzynski.edziennik.ui.dialogs.settings.ProfileRemoveDialog
 import pl.szczodrzynski.edziennik.ui.modules.agenda.AgendaFragment
 import pl.szczodrzynski.edziennik.ui.modules.announcements.AnnouncementsFragment
@@ -215,6 +216,7 @@ class MainActivity : AppCompatActivity() {
     val navView: NavView by lazy { b.navView }
     val drawer: NavDrawer by lazy { navView.drawer }
     val bottomSheet: NavBottomSheet by lazy { navView.bottomSheet }
+    val errorSnackbar: ErrorSnackbar by lazy { ErrorSnackbar(this) }
 
     val swipeRefreshLayout: SwipeRefreshLayoutNoTouch by lazy { b.swipeRefreshLayout }
 
@@ -247,6 +249,8 @@ class MainActivity : AppCompatActivity() {
 
         setContentView(b.root)
 
+        errorSnackbar.setCoordinator(b.navView.coordinator, b.navView.bottomBar)
+
         navLoading = true
 
         b.navView.apply {
@@ -574,7 +578,12 @@ class MainActivity : AppCompatActivity() {
     }
     @Subscribe(threadMode = ThreadMode.MAIN)
     fun onSyncErrorEvent(event: ApiTaskErrorEvent) {
-
+        navView.toolbar.apply {
+            subtitleFormat = R.string.toolbar_subtitle
+            subtitleFormatWithUnread = R.plurals.toolbar_subtitle_with_unread
+            subtitle = "Gotowe"
+        }
+        errorSnackbar.addError(event.error).show()
     }
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onAppManagerDetectedEvent(event: AppManagerDetectedEvent) {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/Errors.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/Errors.kt
index 5f9a59c0..a3b41c45 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/Errors.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/Errors.kt
@@ -163,3 +163,5 @@ const val EXCEPTION_LIBRUS_MESSAGES_REQUEST                 = 911
 const val EXCEPTION_IDZIENNIK_WEB_REQUEST                   = 912
 const val EXCEPTION_IDZIENNIK_WEB_API_REQUEST               = 913
 const val EXCEPTION_IDZIENNIK_API_REQUEST                   = 914
+
+const val LOGIN_NO_ARGUMENTS                                = 1201
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/ApiError.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/ApiError.kt
index d819eac3..effe2a72 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/ApiError.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/ApiError.kt
@@ -4,6 +4,7 @@
 
 package pl.szczodrzynski.edziennik.api.v2.models
 
+import android.content.Context
 import com.google.gson.JsonObject
 import im.wangchao.mhttp.Request
 import im.wangchao.mhttp.Response
@@ -52,6 +53,15 @@ class ApiError(val tag: String, val errorCode: Int) {
         )
     }
 
+    fun getStringReason(context: Context): String {
+        return context.resources.getIdentifier("error_${errorCode}_reason", "string", context.packageName).let {
+            if (it != 0)
+                context.getString(it)
+            else
+                "?"
+        }
+    }
+
     override fun toString(): String {
         return "ApiError(tag='$tag', errorCode=$errorCode, profileId=$profileId, throwable=$throwable, apiResponse=$apiResponse, request=$request, response=$response, isCritical=$isCritical)"
     }
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/error/ErrorSnackbar.kt b/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/error/ErrorSnackbar.kt
new file mode 100644
index 00000000..21899e9f
--- /dev/null
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/error/ErrorSnackbar.kt
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2019-11-13.
+ */
+
+package pl.szczodrzynski.edziennik.ui.dialogs.error
+
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+import androidx.coordinatorlayout.widget.CoordinatorLayout
+import androidx.core.graphics.ColorUtils
+import com.google.android.material.snackbar.Snackbar
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.api.v2.models.ApiError
+import pl.szczodrzynski.edziennik.data.api.AppError
+import pl.szczodrzynski.navlib.getColorFromAttr
+
+class ErrorSnackbar(val activity: AppCompatActivity) {
+    companion object {
+        private const val TAG = "ErrorSnackbar"
+    }
+
+    private var snackbar: Snackbar? = null
+    private lateinit var coordinator: CoordinatorLayout
+    private val errors = mutableListOf<ApiError>()
+
+    fun setCoordinator(coordinatorLayout: CoordinatorLayout, showAbove: View? = null) {
+        this.coordinator = coordinatorLayout
+        snackbar = Snackbar.make(coordinator, R.string.snackbar_error_text, Snackbar.LENGTH_INDEFINITE)
+        snackbar?.setAction(R.string.more) {
+
+        }
+        val bgColor = ColorUtils.compositeColors(
+                getColorFromAttr(activity, R.attr.colorOnSurface) and 0xcfffffff.toInt(),
+                getColorFromAttr(activity, R.attr.colorSurface)
+        )
+        snackbar?.setBackgroundTint(bgColor)
+        showAbove?.let { snackbar?.anchorView = it }
+    }
+
+    fun addError(appError: AppError) {
+
+    }
+    fun addError(apiError: ApiError): ErrorSnackbar {
+        errors += apiError
+        snackbar?.setText(apiError.getStringReason(activity))
+        return this
+    }
+
+    fun show() = snackbar?.show()
+    fun dismiss() = snackbar?.dismiss()
+}
\ No newline at end of file
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/event/EventManualDialog.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/event/EventManualDialog.java
index 8bc27048..f3e747e5 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/event/EventManualDialog.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/event/EventManualDialog.java
@@ -36,7 +36,6 @@ import java.util.List;
 import pl.szczodrzynski.edziennik.App;
 import pl.szczodrzynski.edziennik.MainActivity;
 import pl.szczodrzynski.edziennik.R;
-import pl.szczodrzynski.edziennik.data.api.AppError;
 import pl.szczodrzynski.edziennik.data.db.modules.events.Event;
 import pl.szczodrzynski.edziennik.data.db.modules.events.EventFull;
 import pl.szczodrzynski.edziennik.data.db.modules.events.EventType;
@@ -54,7 +53,6 @@ import pl.szczodrzynski.edziennik.utils.models.Time;
 import pl.szczodrzynski.edziennik.utils.models.Week;
 
 import static pl.szczodrzynski.edziennik.App.APP_URL;
-import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_OTHER;
 import static pl.szczodrzynski.edziennik.data.db.modules.events.Event.COLOR_DEFAULT;
 import static pl.szczodrzynski.edziennik.data.db.modules.events.Event.TYPE_HOMEWORK;
 import static pl.szczodrzynski.edziennik.data.db.modules.events.Event.TYPE_UNDEFINED;
@@ -374,7 +372,8 @@ public class EventManualDialog {
                 }
             } catch (Exception e) {
                 activity.runOnUiThread(() -> {
-                    app.apiEdziennik.guiShowErrorDialog(activity, new AppError(TAG, 379, CODE_OTHER, null, e), R.string.error_occured);
+                    // TODO show error in EventManualDialog
+                    //app.apiEdziennik.guiShowErrorDialog(activity, new AppError(TAG, 379, CODE_OTHER, null, e), R.string.error_occured);
                 });
             }
         });
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginActivity.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginActivity.java
index 6b8e5ac1..f8ec0a4d 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginActivity.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginActivity.java
@@ -15,8 +15,9 @@ import java.util.List;
 
 import pl.szczodrzynski.edziennik.App;
 import pl.szczodrzynski.edziennik.R;
-import pl.szczodrzynski.edziennik.data.api.AppError;
+import pl.szczodrzynski.edziennik.api.v2.models.ApiError;
 import pl.szczodrzynski.edziennik.databinding.ActivityLoginBinding;
+import pl.szczodrzynski.edziennik.ui.dialogs.error.ErrorSnackbar;
 
 public class LoginActivity extends AppCompatActivity {
 
@@ -26,7 +27,8 @@ public class LoginActivity extends AppCompatActivity {
     public static final int RESULT_OK = 1;
     public static NavOptions navOptions;
 
-    static AppError error = null;
+    static ApiError error = null;
+    ErrorSnackbar errorSnackbar = new ErrorSnackbar(this);
 
     static List<LoginProfileObject> profileObjects;
     public static boolean firstCompleted = false; // if a profile is already added during *this* login. This means that LoginChooser has to navigateUp onBackPressed. Else, finish the activity.
@@ -69,6 +71,8 @@ public class LoginActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        setTheme(R.style.AppTheme_Light);
+
         firstCompleted = false;
         profileObjects = new ArrayList<>();
         error = null;
@@ -83,6 +87,8 @@ public class LoginActivity extends AppCompatActivity {
         b = DataBindingUtil.inflate(getLayoutInflater(), R.layout.activity_login, null, false);
         setContentView(b.getRoot());
 
+        errorSnackbar.setCoordinator(b.coordinator, null);
+
         app = (App) getApplication();
 
         if (!app.appConfig.loginFinished) {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginIuczniowieFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginIuczniowieFragment.java
index e1eb8091..4f65ff42 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginIuczniowieFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginIuczniowieFragment.java
@@ -1,25 +1,23 @@
 package pl.szczodrzynski.edziennik.ui.modules.login;
 
 import android.os.Bundle;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.databinding.DataBindingUtil;
-import androidx.fragment.app.Fragment;
-
 import android.text.Editable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import com.danimahardhika.cafebar.CafeBar;
-
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.databinding.DataBindingUtil;
+import androidx.fragment.app.Fragment;
 import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
+
 import pl.szczodrzynski.edziennik.App;
 import pl.szczodrzynski.edziennik.R;
-import pl.szczodrzynski.edziennik.data.api.AppError;
+import pl.szczodrzynski.edziennik.api.v2.models.ApiError;
 import pl.szczodrzynski.edziennik.databinding.FragmentLoginIuczniowieBinding;
+import pl.szczodrzynski.edziennik.ui.dialogs.error.ErrorSnackbar;
 
 import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_INVALID_LOGIN;
 import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_INVALID_SCHOOL_NAME;
@@ -31,6 +29,7 @@ public class LoginIuczniowieFragment extends Fragment {
     private NavController nav;
     private FragmentLoginIuczniowieBinding b;
     private static final String TAG = "LoginIuczniowie";
+    private ErrorSnackbar errorSnackbar;
 
     public LoginIuczniowieFragment() { }
 
@@ -40,6 +39,7 @@ public class LoginIuczniowieFragment extends Fragment {
         if (getActivity() != null) {
             app = (App) getActivity().getApplicationContext();
             nav = Navigation.findNavController(getActivity(), R.id.nav_host_fragment);
+            errorSnackbar = ((LoginActivity) getActivity()).errorSnackbar;
         }
         else {
             return null;
@@ -54,31 +54,17 @@ public class LoginIuczniowieFragment extends Fragment {
         assert getActivity() != null;
 
         view.postDelayed(() -> {
-            AppError error = LoginActivity.error;
+            ApiError error = LoginActivity.error;
             if (error != null) {
-                switch (error.errorCode) {
+                switch (error.getErrorCode()) {
                     case CODE_INVALID_SCHOOL_NAME:
                         b.loginSchoolNameLayout.setError(getString(R.string.login_error_incorrect_school_name));
                         break;
                     case CODE_INVALID_LOGIN:
                         b.loginPasswordLayout.setError(getString(R.string.login_error_incorrect_login_or_password));
                         break;
-                    default:
-                        CafeBar.builder(getActivity())
-                                .to(b.root)
-                                .content(getString(R.string.login_error, error.asReadableString(getActivity())))
-                                .autoDismiss(false)
-                                .positiveText(R.string.ok)
-                                .onPositive(CafeBar::dismiss)
-                                .floating(true)
-                                .swipeToDismiss(true)
-                                .neutralText(R.string.more)
-                                .onNeutral(cafeBar -> app.apiEdziennik.guiShowErrorDialog(getActivity(), error, R.string.error_details))
-                                .negativeText(R.string.report)
-                                .onNegative((cafeBar -> app.apiEdziennik.guiReportError(getActivity(), error, null)))
-                                .show();
-                        break;
                 }
+                errorSnackbar.addError(error).show();
                 LoginActivity.error = null;
             }
         }, 100);
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginLibrusFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginLibrusFragment.java
index fb0612fd..f865483c 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginLibrusFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginLibrusFragment.java
@@ -1,28 +1,26 @@
 package pl.szczodrzynski.edziennik.ui.modules.login;
 
 import android.os.Bundle;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.databinding.DataBindingUtil;
-import androidx.fragment.app.Fragment;
-
 import android.text.Editable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import com.danimahardhika.cafebar.CafeBar;
-
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.databinding.DataBindingUtil;
+import androidx.fragment.app.Fragment;
 import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
+
 import pl.szczodrzynski.edziennik.App;
 import pl.szczodrzynski.edziennik.R;
-import pl.szczodrzynski.edziennik.data.api.AppError;
+import pl.szczodrzynski.edziennik.api.v2.models.ApiError;
 import pl.szczodrzynski.edziennik.databinding.FragmentLoginLibrusBinding;
+import pl.szczodrzynski.edziennik.ui.dialogs.error.ErrorSnackbar;
 
-import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_INVALID_LOGIN;
-import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_LIBRUS_NOT_ACTIVATED;
+import static pl.szczodrzynski.edziennik.api.v2.ErrorsKt.ERROR_LOGIN_DATA_INVALID;
+import static pl.szczodrzynski.edziennik.api.v2.ErrorsKt.ERROR_LOGIN_LIBRUS_PORTAL_NOT_ACTIVATED;
 import static pl.szczodrzynski.edziennik.data.db.modules.login.LoginStore.LOGIN_TYPE_LIBRUS;
 
 public class LoginLibrusFragment extends Fragment {
@@ -31,6 +29,7 @@ public class LoginLibrusFragment extends Fragment {
     private NavController nav;
     private FragmentLoginLibrusBinding b;
     private static final String TAG = "LoginLibrus";
+    private ErrorSnackbar errorSnackbar;
 
     public LoginLibrusFragment() { }
 
@@ -40,6 +39,7 @@ public class LoginLibrusFragment extends Fragment {
         if (getActivity() != null) {
             app = (App) getActivity().getApplicationContext();
             nav = Navigation.findNavController(getActivity(), R.id.nav_host_fragment);
+            errorSnackbar = ((LoginActivity) getActivity()).errorSnackbar;
         }
         else {
             return null;
@@ -54,32 +54,17 @@ public class LoginLibrusFragment extends Fragment {
         assert getActivity() != null;
 
         view.postDelayed(() -> {
-            AppError error = LoginActivity.error;
+            ApiError error = LoginActivity.error;
             if (error != null) {
-                switch (error.errorCode) {
-                    case CODE_INVALID_LOGIN:
+                switch (error.getErrorCode()) {
+                    case ERROR_LOGIN_DATA_INVALID:
                         b.loginPasswordLayout.setError(getString(R.string.login_error_incorrect_login_or_password));
                         break;
-                    case CODE_LIBRUS_NOT_ACTIVATED:
+                    case ERROR_LOGIN_LIBRUS_PORTAL_NOT_ACTIVATED:
                         b.loginEmailLayout.setError(getString(R.string.login_error_account_not_activated));
                         break;
-                    default:
-                        CafeBar.builder(getActivity())
-                                .to(b.root)
-                                .content(getString(R.string.login_error, error.asReadableString(getActivity())))
-                                .duration(10000)
-                                .autoDismiss(false)
-                                .positiveText(R.string.ok)
-                                .onPositive(CafeBar::dismiss)
-                                .floating(true)
-                                .swipeToDismiss(true)
-                                .neutralText(R.string.more)
-                                .onNeutral(cafeBar -> app.apiEdziennik.guiShowErrorDialog(getActivity(), error, R.string.error_details))
-                                .negativeText(R.string.report)
-                                .onNegative((cafeBar -> app.apiEdziennik.guiReportError(getActivity(), error, null)))
-                                .show();
-                        break;
                 }
+                errorSnackbar.addError(error).show();
                 LoginActivity.error = null;
             }
         }, 100);
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginMobidziennikFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginMobidziennikFragment.java
index 0c4c5f33..fbaf952a 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginMobidziennikFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginMobidziennikFragment.java
@@ -1,23 +1,23 @@
 package pl.szczodrzynski.edziennik.ui.modules.login;
 
-import androidx.databinding.DataBindingUtil;
 import android.os.Bundle;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.fragment.app.Fragment;
 import android.text.Editable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import com.danimahardhika.cafebar.CafeBar;
-
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.databinding.DataBindingUtil;
+import androidx.fragment.app.Fragment;
 import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
+
 import pl.szczodrzynski.edziennik.App;
 import pl.szczodrzynski.edziennik.R;
-import pl.szczodrzynski.edziennik.data.api.AppError;
+import pl.szczodrzynski.edziennik.api.v2.models.ApiError;
 import pl.szczodrzynski.edziennik.databinding.FragmentLoginMobidziennikBinding;
+import pl.szczodrzynski.edziennik.ui.dialogs.error.ErrorSnackbar;
 
 import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_ARCHIVED;
 import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_INVALID_LOGIN;
@@ -31,6 +31,7 @@ public class LoginMobidziennikFragment extends Fragment {
     private NavController nav;
     private FragmentLoginMobidziennikBinding b;
     private static final String TAG = "LoginMobidziennik";
+    private ErrorSnackbar errorSnackbar;
 
     public LoginMobidziennikFragment() { }
 
@@ -40,6 +41,7 @@ public class LoginMobidziennikFragment extends Fragment {
         if (getActivity() != null) {
             app = (App) getActivity().getApplicationContext();
             nav = Navigation.findNavController(getActivity(), R.id.nav_host_fragment);
+            errorSnackbar = ((LoginActivity) getActivity()).errorSnackbar;
         }
         else {
             return null;
@@ -54,9 +56,9 @@ public class LoginMobidziennikFragment extends Fragment {
         assert getActivity() != null;
 
         view.postDelayed(() -> {
-            AppError error = LoginActivity.error;
+            ApiError error = LoginActivity.error;
             if (error != null) {
-                switch (error.errorCode) {
+                switch (error.getErrorCode()) {
                     case CODE_INVALID_LOGIN:
                         b.loginPasswordLayout.setError(getString(R.string.login_error_incorrect_login_or_password));
                         break;
@@ -69,22 +71,8 @@ public class LoginMobidziennikFragment extends Fragment {
                     case CODE_INVALID_SERVER_ADDRESS:
                         b.loginServerAddressLayout.setError(getString(R.string.login_error_incorrect_address));
                         break;
-                    default:
-                        CafeBar.builder(getActivity())
-                                .to(b.root)
-                                .content(getString(R.string.login_error, error.asReadableString(getActivity())))
-                                .autoDismiss(false)
-                                .positiveText(R.string.ok)
-                                .onPositive(CafeBar::dismiss)
-                                .floating(true)
-                                .swipeToDismiss(true)
-                                .neutralText(R.string.more)
-                                .onNeutral(cafeBar -> app.apiEdziennik.guiShowErrorDialog(getActivity(), error, R.string.error_details))
-                                .negativeText(R.string.report)
-                                .onNegative((cafeBar -> app.apiEdziennik.guiReportError(getActivity(), error, null)))
-                                .show();
-                        break;
                 }
+                errorSnackbar.addError(error).show();
                 LoginActivity.error = null;
             }
         }, 100);
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.java
index bce2a0be..e229d151 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.java
@@ -23,11 +23,11 @@ import pl.szczodrzynski.edziennik.R;
 import pl.szczodrzynski.edziennik.api.v2.events.ApiTaskErrorEvent;
 import pl.szczodrzynski.edziennik.api.v2.events.FirstLoginFinishedEvent;
 import pl.szczodrzynski.edziennik.api.v2.events.task.EdziennikTask;
-import pl.szczodrzynski.edziennik.data.api.AppError;
+import pl.szczodrzynski.edziennik.api.v2.models.ApiError;
 import pl.szczodrzynski.edziennik.data.db.modules.login.LoginStore;
 import pl.szczodrzynski.edziennik.databinding.FragmentLoginProgressBinding;
 
-import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_OTHER;
+import static pl.szczodrzynski.edziennik.api.v2.ErrorsKt.LOGIN_NO_ARGUMENTS;
 
 public class LoginProgressFragment extends Fragment {
 
@@ -62,7 +62,7 @@ public class LoginProgressFragment extends Fragment {
 
     @Subscribe(threadMode = ThreadMode.MAIN)
     public void onSyncErrorEvent(ApiTaskErrorEvent event) {
-        LoginActivity.error = event.getError().toAppError();
+        LoginActivity.error = event.getError();
         if (getActivity() == null)
             return;
         nav.navigateUp();
@@ -79,7 +79,7 @@ public class LoginProgressFragment extends Fragment {
         LoginActivity.error = null;
 
         if (args == null) {
-            LoginActivity.error = new AppError(TAG, 72, CODE_OTHER, getString(R.string.login_error_no_arguments));
+            LoginActivity.error = new ApiError(TAG, LOGIN_NO_ARGUMENTS);
             nav.navigateUp();
             return;
         }
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginSyncErrorFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginSyncErrorFragment.java
index 951c53e8..52ff1a0f 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginSyncErrorFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginSyncErrorFragment.java
@@ -1,6 +1,9 @@
 package pl.szczodrzynski.edziennik.ui.modules.login;
 
 import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -8,14 +11,11 @@ import androidx.databinding.DataBindingUtil;
 import androidx.fragment.app.Fragment;
 import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
+
 import pl.szczodrzynski.edziennik.App;
 import pl.szczodrzynski.edziennik.R;
 import pl.szczodrzynski.edziennik.databinding.FragmentLoginSyncErrorBinding;
 
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
 public class LoginSyncErrorFragment extends Fragment {
 
     private App app;
@@ -44,10 +44,10 @@ public class LoginSyncErrorFragment extends Fragment {
         assert getContext() != null;
         assert getActivity() != null;
 
-        b.errorDetails.setText(LoginActivity.error == null ? "" : LoginActivity.error.asReadableString(getActivity()));
+        b.errorDetails.setText(LoginActivity.error == null ? "" : LoginActivity.error.getStringReason(getActivity()));
 
         b.reportButton.setOnClickListener((v -> {
-            app.apiEdziennik.guiReportError(getActivity(), LoginActivity.error, null);
+            // TODO error report activity open here app.apiEdziennik.guiReportError(getActivity(), LoginActivity.error, null);
         }));
 
         b.nextButton.setOnClickListener((v -> {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginSyncFragment.kt b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginSyncFragment.kt
index 696505e7..16a198b2 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginSyncFragment.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginSyncFragment.kt
@@ -65,7 +65,7 @@ class LoginSyncFragment : Fragment() {
 
     @Subscribe(threadMode = ThreadMode.MAIN)
     fun onSyncErrorEvent(event: ApiTaskErrorEvent) {
-        LoginActivity.error = event.error.toAppError()
+        LoginActivity.error = event.error
         nav.navigate(R.id.loginSyncErrorFragment, null, LoginActivity.navOptions)
     }
 
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginVulcanFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginVulcanFragment.java
index 7b65eead..9c81cdc2 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginVulcanFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginVulcanFragment.java
@@ -3,27 +3,24 @@ package pl.szczodrzynski.edziennik.ui.modules.login;
 import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.databinding.DataBindingUtil;
-import androidx.fragment.app.Fragment;
-
 import android.text.Editable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowManager;
 
-import com.danimahardhika.cafebar.CafeBar;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.databinding.DataBindingUtil;
+import androidx.fragment.app.Fragment;
+import androidx.navigation.NavController;
+import androidx.navigation.Navigation;
+
 import com.mikepenz.iconics.IconicsColor;
 import com.mikepenz.iconics.IconicsDrawable;
 import com.mikepenz.iconics.IconicsSize;
 import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial;
 
-import androidx.navigation.NavController;
-import androidx.navigation.Navigation;
-
 import java.security.InvalidKeyException;
 import java.security.NoSuchAlgorithmException;
 import java.util.regex.Matcher;
@@ -36,9 +33,10 @@ import javax.crypto.ShortBufferException;
 
 import pl.szczodrzynski.edziennik.App;
 import pl.szczodrzynski.edziennik.R;
-import pl.szczodrzynski.edziennik.ui.modules.webpush.QrScannerActivity;
-import pl.szczodrzynski.edziennik.data.api.AppError;
+import pl.szczodrzynski.edziennik.api.v2.models.ApiError;
 import pl.szczodrzynski.edziennik.databinding.FragmentLoginVulcanBinding;
+import pl.szczodrzynski.edziennik.ui.dialogs.error.ErrorSnackbar;
+import pl.szczodrzynski.edziennik.ui.modules.webpush.QrScannerActivity;
 import pl.szczodrzynski.edziennik.utils.Utils;
 
 import static pl.szczodrzynski.edziennik.data.api.AppError.CODE_EXPIRED_TOKEN;
@@ -53,6 +51,7 @@ public class LoginVulcanFragment extends Fragment {
     private NavController nav;
     private FragmentLoginVulcanBinding b;
     private static final String TAG = "LoginVulcan";
+    private ErrorSnackbar errorSnackbar;
 
     public LoginVulcanFragment() { }
 
@@ -62,6 +61,7 @@ public class LoginVulcanFragment extends Fragment {
         if (getActivity() != null) {
             app = (App) getActivity().getApplicationContext();
             nav = Navigation.findNavController(getActivity(), R.id.nav_host_fragment);
+            errorSnackbar = ((LoginActivity) getActivity()).errorSnackbar;
         }
         else {
             return null;
@@ -76,9 +76,9 @@ public class LoginVulcanFragment extends Fragment {
         assert getActivity() != null;
 
         view.postDelayed(() -> {
-            AppError error = LoginActivity.error;
+            ApiError error = LoginActivity.error;
             if (error != null) {
-                switch (error.errorCode) {
+                switch (error.getErrorCode()) {
                     case CODE_INVALID_TOKEN:
                         b.loginTokenLayout.setError(getString(R.string.login_error_incorrect_token));
                         break;
@@ -89,28 +89,14 @@ public class LoginVulcanFragment extends Fragment {
                         b.loginSymbolLayout.setError(getString(R.string.login_error_incorrect_symbol));
                         break;
                     case CODE_INVALID_PIN:
-                        if (!"?".equals(error.errorText)) {
+                        /*if (!"?".equals(error.errorText)) {
                             b.loginPinLayout.setError(getString(R.string.login_error_incorrect_pin_format, error.errorText));
                             break;
-                        }
+                        }*/
                         b.loginPinLayout.setError(getString(R.string.login_error_incorrect_pin));
                         break;
-                    default:
-                        CafeBar.builder(getActivity())
-                                .to(b.root)
-                                .content(getString(R.string.login_error, error.asReadableString(getActivity())))
-                                .autoDismiss(false)
-                                .positiveText(R.string.ok)
-                                .onPositive(CafeBar::dismiss)
-                                .floating(true)
-                                .swipeToDismiss(true)
-                                .neutralText(R.string.more)
-                                .onNeutral(cafeBar -> app.apiEdziennik.guiShowErrorDialog(getActivity(), error, R.string.error_details))
-                                .negativeText(R.string.report)
-                                .onNegative((cafeBar -> app.apiEdziennik.guiReportError(getActivity(), error, null)))
-                                .show();
-                        break;
                 }
+                errorSnackbar.addError(error).show();
                 LoginActivity.error = null;
             }
         }, 100);
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/MessagesComposeActivity.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/MessagesComposeActivity.java
index ff22e48e..18153386 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/MessagesComposeActivity.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/MessagesComposeActivity.java
@@ -4,7 +4,6 @@ import android.content.Context;
 import android.graphics.Color;
 import android.graphics.drawable.BitmapDrawable;
 import android.os.Bundle;
-import android.os.Handler;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MotionEvent;
@@ -13,7 +12,6 @@ import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
 import androidx.databinding.DataBindingUtil;
 
 import com.afollestad.materialdialogs.MaterialDialog;
@@ -35,12 +33,6 @@ import java.util.List;
 
 import pl.szczodrzynski.edziennik.App;
 import pl.szczodrzynski.edziennik.R;
-import pl.szczodrzynski.edziennik.data.api.AppError;
-import pl.szczodrzynski.edziennik.data.api.Edziennik;
-import pl.szczodrzynski.edziennik.data.api.interfaces.SyncCallback;
-import pl.szczodrzynski.edziennik.data.db.modules.login.LoginStore;
-import pl.szczodrzynski.edziennik.data.db.modules.profiles.Profile;
-import pl.szczodrzynski.edziennik.data.db.modules.profiles.ProfileFull;
 import pl.szczodrzynski.edziennik.data.db.modules.teachers.Teacher;
 import pl.szczodrzynski.edziennik.databinding.ActivityComposeMessageBinding;
 import pl.szczodrzynski.edziennik.utils.Colors;
@@ -63,7 +55,7 @@ public class MessagesComposeActivity extends AppCompatActivity {
         b = DataBindingUtil.inflate(getLayoutInflater(), R.layout.activity_compose_message, null, false);
         setContentView(b.getRoot());
 
-        composeInfo = Edziennik.getApi(app, app.profile.getLoginStoreType()).getComposeInfo(app.profile);
+        /*composeInfo = Edziennik.getApi(app, app.profile.getLoginStoreType()).getComposeInfo(app.profile);
 
         Toolbar toolbar = b.toolbar;
         setSupportActionBar(toolbar);
@@ -99,7 +91,7 @@ public class MessagesComposeActivity extends AppCompatActivity {
             MessagesComposeSuggestionAdapter adapter = new MessagesComposeSuggestionAdapter(this, teachers);
             //ArrayAdapter<Teacher> adapter = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line, teachers);
             b.nachoTextView.setAdapter(adapter);
-        });
+        });*/
         /*app.db.teacherDao().getAllTeachers(App.profileId).observe(this, teachers -> {
 
         });*/
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/MessagesDetailsFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/MessagesDetailsFragment.java
index 645b66d3..2bf92359 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/MessagesDetailsFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/MessagesDetailsFragment.java
@@ -1,17 +1,12 @@
 package pl.szczodrzynski.edziennik.ui.modules.messages;
 
-import android.content.Context;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.media.ThumbnailUtils;
 import android.net.Uri;
-import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Environment;
-import android.os.Handler;
-import android.text.Html;
-import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -19,12 +14,18 @@ import android.widget.FrameLayout;
 import android.widget.ProgressBar;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.core.graphics.drawable.RoundedBitmapDrawable;
+import androidx.core.graphics.drawable.RoundedBitmapDrawableFactory;
+import androidx.databinding.DataBindingUtil;
+import androidx.fragment.app.Fragment;
+
 import com.afollestad.materialdialogs.MaterialDialog;
 import com.google.android.material.chip.Chip;
 import com.mikepenz.iconics.IconicsColor;
 import com.mikepenz.iconics.IconicsDrawable;
 import com.mikepenz.iconics.IconicsSize;
-import com.mikepenz.iconics.typeface.IIcon;
 import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial;
 import com.theartofdev.edmodo.cropper.CropImage;
 
@@ -39,36 +40,15 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.core.graphics.drawable.RoundedBitmapDrawable;
-import androidx.core.graphics.drawable.RoundedBitmapDrawableFactory;
-import androidx.databinding.DataBindingUtil;
-import androidx.fragment.app.Fragment;
-
-import im.wangchao.mhttp.Response;
-import im.wangchao.mhttp.callback.FileCallbackHandler;
 import pl.szczodrzynski.edziennik.App;
-import pl.szczodrzynski.edziennik.R;
 import pl.szczodrzynski.edziennik.MainActivity;
-import pl.szczodrzynski.edziennik.data.api.Edziennik;
-import pl.szczodrzynski.edziennik.data.api.AppError;
-import pl.szczodrzynski.edziennik.data.api.interfaces.SyncCallback;
-import pl.szczodrzynski.edziennik.databinding.MessagesDetailsBinding;
-import pl.szczodrzynski.edziennik.data.db.modules.login.LoginStore;
+import pl.szczodrzynski.edziennik.R;
 import pl.szczodrzynski.edziennik.data.db.modules.messages.MessageFull;
-import pl.szczodrzynski.edziennik.data.db.modules.messages.MessageRecipientFull;
-import pl.szczodrzynski.edziennik.data.db.modules.profiles.Profile;
-import pl.szczodrzynski.edziennik.data.db.modules.profiles.ProfileFull;
-import pl.szczodrzynski.edziennik.utils.models.Date;
-import pl.szczodrzynski.edziennik.utils.models.Time;
-import pl.szczodrzynski.edziennik.utils.Anim;
+import pl.szczodrzynski.edziennik.databinding.MessagesDetailsBinding;
 import pl.szczodrzynski.edziennik.utils.Themes;
 import pl.szczodrzynski.edziennik.utils.Utils;
 
 import static android.app.Activity.RESULT_OK;
-import static android.view.Gravity.CENTER_VERTICAL;
-import static android.view.Gravity.END;
 import static pl.szczodrzynski.edziennik.utils.Utils.getResizedBitmap;
 import static pl.szczodrzynski.edziennik.utils.Utils.getStringFromFile;
 import static pl.szczodrzynski.edziennik.utils.Utils.readableFileSize;
@@ -108,7 +88,7 @@ public class MessagesDetailsFragment extends Fragment {
 
         b.messageContent.setVisibility(View.GONE);
 
-        if (messageId != -1) {
+        /*if (messageId != -1) {
             AsyncTask.execute(() -> {
                 if (app == null || app.profile == null || activity == null || b == null || !isAdded())
                     return;
@@ -286,7 +266,7 @@ public class MessagesDetailsFragment extends Fragment {
                 });
 
             });
-        }
+        }*/
 
         // click to expand subject and sender
         b.messageSubject.setOnClickListener(v -> {
@@ -359,7 +339,7 @@ public class MessagesDetailsFragment extends Fragment {
 
         File storageDir = Utils.getStorageDir();
 
-        Edziennik.getApi(app, app.profile.getLoginStoreType()).getAttachment(activity, new SyncCallback() {
+        /*Edziennik.getApi(app, app.profile.getLoginStoreType()).getAttachment(activity, new SyncCallback() {
             @Override
             public void onLoginFirst(List<Profile> profileList, LoginStore loginStore) {
 
@@ -437,7 +417,7 @@ public class MessagesDetailsFragment extends Fragment {
                     }
                 })
                 .build()
-                .enqueue());
+                .enqueue());*/
     }
 
     @Subscribe(threadMode = ThreadMode.POSTING)
diff --git a/app/src/main/res/layout/activity_login.xml b/app/src/main/res/layout/activity_login.xml
index f22cb668..d7aaa2ab 100644
--- a/app/src/main/res/layout/activity_login.xml
+++ b/app/src/main/res/layout/activity_login.xml
@@ -8,16 +8,17 @@
         android:orientation="vertical"
         android:visibility="visible">
 
-        <LinearLayout
+        <Space
+            android:layout_width="0dp"
+            android:layout_height="32dp" />
+
+        <androidx.coordinatorlayout.widget.CoordinatorLayout
+            android:id="@+id/coordinator"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:orientation="vertical"
             android:visibility="visible">
 
-            <Space
-                android:layout_width="0dp"
-                android:layout_height="32dp" />
-
             <fragment
                 android:id="@+id/nav_host_fragment"
                 android:name="androidx.navigation.fragment.NavHostFragment"
@@ -30,7 +31,7 @@
 
                 app:layout_constraintTop_toTopOf="parent"
                 app:navGraph="@navigation/nav_login" />
-        </LinearLayout>
+        </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
         <!--<io.codetail.widget.RevealFrameLayout
             android:layout_width="match_parent"
diff --git a/app/src/main/res/values/errors.xml b/app/src/main/res/values/errors.xml
new file mode 100644
index 00000000..1642ea4c
--- /dev/null
+++ b/app/src/main/res/values/errors.xml
@@ -0,0 +1,276 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2019-11-13.
+  -->
+
+<resources>
+    <string name="error_50" translatable="false">ERROR_REQUEST_FAILURE</string>
+    <string name="error_51" translatable="false">ERROR_REQUEST_HTTP_400</string>
+    <string name="error_52" translatable="false">ERROR_REQUEST_HTTP_401</string>
+    <string name="error_53" translatable="false">ERROR_REQUEST_HTTP_403</string>
+    <string name="error_54" translatable="false">ERROR_REQUEST_HTTP_404</string>
+    <string name="error_55" translatable="false">ERROR_REQUEST_HTTP_405</string>
+    <string name="error_56" translatable="false">ERROR_REQUEST_HTTP_410</string>
+    <string name="error_57" translatable="false">ERROR_REQUEST_HTTP_500</string>
+    <string name="error_100" translatable="false">ERROR_RESPONSE_EMPTY</string>
+    <string name="error_101" translatable="false">ERROR_LOGIN_DATA_MISSING</string>
+    <string name="error_102" translatable="false">ERROR_LOGIN_DATA_INVALID</string>
+    <string name="error_105" translatable="false">ERROR_PROFILE_MISSING</string>
+    <string name="error_110" translatable="false">ERROR_INVALID_LOGIN_MODE</string>
+    <string name="error_111" translatable="false">ERROR_LOGIN_METHOD_NOT_SATISFIED</string>
+    <string name="error_112" translatable="false">ERROR_NOT_IMPLEMENTED</string>
+
+    <string name="error_115" translatable="false">ERROR_NO_STUDENTS_IN_ACCOUNT</string>
+
+    <string name="error_120" translatable="false">CODE_INTERNAL_LIBRUS_ACCOUNT_410</string>
+    <string name="error_121" translatable="false">CODE_INTERNAL_LIBRUS_SYNERGIA_EXPIRED</string>
+    <string name="error_124" translatable="false">ERROR_LOGIN_LIBRUS_API_CAPTCHA_NEEDED</string>
+    <string name="error_125" translatable="false">ERROR_LOGIN_LIBRUS_API_CONNECTION_PROBLEMS</string>
+    <string name="error_126" translatable="false">ERROR_LOGIN_LIBRUS_API_INVALID_CLIENT</string>
+    <string name="error_127" translatable="false">ERROR_LOGIN_LIBRUS_API_REG_ACCEPT_NEEDED</string>
+    <string name="error_128" translatable="false">ERROR_LOGIN_LIBRUS_API_CHANGE_PASSWORD_ERROR</string>
+    <string name="error_129" translatable="false">ERROR_LOGIN_LIBRUS_API_PASSWORD_CHANGE_REQUIRED</string>
+    <string name="error_130" translatable="false">ERROR_LOGIN_LIBRUS_API_INVALID_LOGIN</string>
+    <string name="error_131" translatable="false">ERROR_LOGIN_LIBRUS_API_OTHER</string>
+    <string name="error_132" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_CSRF_MISSING</string>
+    <string name="error_133" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_NOT_ACTIVATED</string>
+    <string name="error_134" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_ACTION_ERROR</string>
+    <string name="error_139" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_SYNERGIA_TOKEN_MISSING</string>
+    <string name="error_140" translatable="false">ERROR_LIBRUS_API_TOKEN_EXPIRED</string>
+    <string name="error_141" translatable="false">ERROR_LIBRUS_API_INSUFFICIENT_SCOPES</string>
+    <string name="error_142" translatable="false">ERROR_LIBRUS_API_OTHER</string>
+    <string name="error_143" translatable="false">ERROR_LIBRUS_API_ACCESS_DENIED</string>
+    <string name="error_144" translatable="false">ERROR_LIBRUS_API_RESOURCE_NOT_FOUND</string>
+    <string name="error_145" translatable="false">ERROR_LIBRUS_API_DATA_NOT_FOUND</string>
+    <string name="error_146" translatable="false">ERROR_LIBRUS_API_TIMETABLE_NOT_PUBLIC</string>
+    <string name="error_147" translatable="false">ERROR_LIBRUS_API_RESOURCE_ACCESS_DENIED</string>
+    <string name="error_148" translatable="false">ERROR_LIBRUS_API_INVALID_REQUEST_PARAMS</string>
+    <string name="error_149" translatable="false">ERROR_LIBRUS_API_INCORRECT_ENDPOINT</string>
+    <string name="error_150" translatable="false">ERROR_LIBRUS_API_LUCKY_NUMBER_NOT_ACTIVE</string>
+    <string name="error_151" translatable="false">ERROR_LIBRUS_API_NOTES_NOT_ACTIVE</string>
+    <string name="error_152" translatable="false">ERROR_LOGIN_LIBRUS_SYNERGIA_NO_TOKEN</string>
+    <string name="error_153" translatable="false">ERROR_LOGIN_LIBRUS_SYNERGIA_TOKEN_INVALID</string>
+    <string name="error_154" translatable="false">ERROR_LOGIN_LIBRUS_SYNERGIA_NO_SESSION_ID</string>
+    <string name="error_155" translatable="false">ERROR_LIBRUS_MESSAGES_ACCESS_DENIED</string>
+    <string name="error_156" translatable="false">ERROR_LIBRUS_SYNERGIA_ACCESS_DENIED</string>
+    <string name="error_157" translatable="false">ERROR_LOGIN_LIBRUS_MESSAGES_NO_SESSION_ID</string>
+    <string name="error_158" translatable="false">ERROR_LIBRUS_PORTAL_ACCESS_DENIED</string>
+    <string name="error_159" translatable="false">ERROR_LIBRUS_PORTAL_API_DISABLED</string>
+    <string name="error_160" translatable="false">ERROR_LIBRUS_PORTAL_SYNERGIA_DISCONNECTED</string>
+    <string name="error_161" translatable="false">ERROR_LIBRUS_PORTAL_OTHER</string>
+    <string name="error_162" translatable="false">ERROR_LIBRUS_PORTAL_SYNERGIA_NOT_FOUND</string>
+    <string name="error_163" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_OTHER</string>
+    <string name="error_164" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_CODE_EXPIRED</string>
+    <string name="error_165" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_CODE_REVOKED</string>
+    <string name="error_166" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_NO_CLIENT_ID</string>
+    <string name="error_167" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_NO_CODE</string>
+    <string name="error_168" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_NO_REFRESH</string>
+    <string name="error_169" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_NO_REDIRECT</string>
+    <string name="error_170" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_UNSUPPORTED_GRANT</string>
+    <string name="error_171" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_INVALID_CLIENT_ID</string>
+    <string name="error_172" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_REFRESH_INVALID</string>
+    <string name="error_173" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_REFRESH_REVOKED</string>
+    <string name="error_174" translatable="false">ERROR_LIBRUS_SYNERGIA_OTHER</string>
+    <string name="error_175" translatable="false">ERROR_LIBRUS_SYNERGIA_MAINTENANCE</string>
+
+    <string name="error_201" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_LOGIN</string>
+    <string name="error_202" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_OLD_PASSWORD</string>
+    <string name="error_203" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_DEVICE</string>
+    <string name="error_204" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_ARCHIVED</string>
+    <string name="error_205" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_MAINTENANCE</string>
+    <string name="error_206" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_ADDRESS</string>
+    <string name="error_210" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_OTHER</string>
+    <string name="error_211" translatable="false">ERROR_MOBIDZIENNIK_WEB_ACCESS_DENIED</string>
+    <string name="error_212" translatable="false">ERROR_MOBIDZIENNIK_WEB_NO_SESSION_KEY</string>
+    <string name="error_216" translatable="false">ERROR_MOBIDZIENNIK_WEB_NO_SESSION_VALUE</string>
+    <string name="error_213" translatable="false">ERROR_MOBIDZIENNIK_WEB_NO_SERVER_ID</string>
+    <string name="error_214" translatable="false">ERROR_MOBIDZIENNIK_WEB_INVALID_RESPONSE</string>
+    <string name="error_215" translatable="false">ERROR_LOGIN_MOBIDZIENNIK_WEB_NO_SESSION_ID</string>
+
+    <string name="error_301" translatable="false">ERROR_LOGIN_VULCAN_INVALID_SYMBOL</string>
+    <string name="error_302" translatable="false">ERROR_LOGIN_VULCAN_INVALID_TOKEN</string>
+    <string name="error_309" translatable="false">ERROR_LOGIN_VULCAN_INVALID_PIN</string>
+    <string name="error_310" translatable="false">ERROR_LOGIN_VULCAN_INVALID_PIN_0_REMAINING</string>
+    <string name="error_311" translatable="false">ERROR_LOGIN_VULCAN_INVALID_PIN_1_REMAINING</string>
+    <string name="error_312" translatable="false">ERROR_LOGIN_VULCAN_INVALID_PIN_2_REMAINING</string>
+    <string name="error_321" translatable="false">ERROR_LOGIN_VULCAN_EXPIRED_TOKEN</string>
+    <string name="error_322" translatable="false">ERROR_LOGIN_VULCAN_OTHER</string>
+    <string name="error_330" translatable="false">ERROR_LOGIN_VULCAN_ONLY_KINDERGARTEN</string>
+    <string name="error_331" translatable="false">ERROR_LOGIN_VULCAN_NO_PUPILS</string>
+    <string name="error_340" translatable="false">ERROR_VULCAN_API_MAINTENANCE</string>
+    <string name="error_341" translatable="false">ERROR_VULCAN_API_BAD_REQUEST</string>
+    <string name="error_342" translatable="false">ERROR_VULCAN_API_OTHER</string>
+
+    <string name="error_401" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_INVALID_LOGIN</string>
+    <string name="error_402" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_INVALID_SCHOOL_NAME</string>
+    <string name="error_403" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_PASSWORD_CHANGE_NEEDED</string>
+    <string name="error_404" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_MAINTENANCE</string>
+    <string name="error_405" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_SERVER_ERROR</string>
+    <string name="error_410" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_OTHER</string>
+    <string name="error_411" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_API_NO_ACCESS</string>
+    <string name="error_420" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_NO_SESSION</string>
+    <string name="error_421" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_NO_AUTH</string>
+    <string name="error_422" translatable="false">ERROR_LOGIN_IDZIENNIK_WEB_NO_BEARER</string>
+    <string name="error_430" translatable="false">ERROR_IDZIENNIK_WEB_ACCESS_DENIED</string>
+    <string name="error_431" translatable="false">ERROR_IDZIENNIK_WEB_OTHER</string>
+    <string name="error_432" translatable="false">ERROR_IDZIENNIK_WEB_MAINTENANCE</string>
+    <string name="error_433" translatable="false">ERROR_IDZIENNIK_WEB_SERVER_ERROR</string>
+    <string name="error_434" translatable="false">ERROR_IDZIENNIK_WEB_PASSWORD_CHANGE_NEEDED</string>
+    <string name="error_440" translatable="false">ERROR_LOGIN_IDZIENNIK_FIRST_NO_SCHOOL_YEAR</string>
+    <string name="error_441" translatable="false">ERROR_IDZIENNIK_WEB_REQUEST_NO_DATA</string>
+    <string name="error_450" translatable="false">ERROR_IDZIENNIK_API_ACCESS_DENIED</string>
+    <string name="error_451" translatable="false">ERROR_IDZIENNIK_API_OTHER</string>
+
+    <string name="error_801" translatable="false">ERROR_TEMPLATE_WEB_OTHER</string>
+
+    <string name="error_900" translatable="false">EXCEPTION_API_TASK</string>
+    <string name="error_901" translatable="false">EXCEPTION_LOGIN_LIBRUS_API_TOKEN</string>
+    <string name="error_902" translatable="false">EXCEPTION_LOGIN_LIBRUS_PORTAL_TOKEN</string>
+    <string name="error_903" translatable="false">EXCEPTION_LIBRUS_PORTAL_SYNERGIA_TOKEN</string>
+    <string name="error_904" translatable="false">EXCEPTION_LIBRUS_API_REQUEST</string>
+    <string name="error_905" translatable="false">EXCEPTION_LIBRUS_SYNERGIA_REQUEST</string>
+    <string name="error_906" translatable="false">EXCEPTION_MOBIDZIENNIK_WEB_REQUEST</string>
+    <string name="error_907" translatable="false">EXCEPTION_VULCAN_API_REQUEST</string>
+    <string name="error_910" translatable="false">EXCEPTION_NOTIFY_AND_SYNC</string>
+    <string name="error_911" translatable="false">EXCEPTION_LIBRUS_MESSAGES_REQUEST</string>
+    <string name="error_912" translatable="false">EXCEPTION_IDZIENNIK_WEB_REQUEST</string>
+    <string name="error_913" translatable="false">EXCEPTION_IDZIENNIK_WEB_API_REQUEST</string>
+    <string name="error_914" translatable="false">EXCEPTION_IDZIENNIK_API_REQUEST</string>
+
+    <string name="error_1201" translatable="false">LOGIN_NO_ARGUMENTS</string>
+
+    <string name="error_50_reason">Błąd odpowiedzi serwera</string>
+    <string name="error_51_reason">Błąd serwera: nieprawidłowe zapytanie</string>
+    <string name="error_52_reason">Błąd serwera: odmowa dostępu</string>
+    <string name="error_53_reason">Błąd serwera: dostęp zabroniony</string>
+    <string name="error_54_reason">Błąd serwera: plik nie znaleziony</string>
+    <string name="error_55_reason">Błąd serwera: nieprawidłowa metoda zapytania</string>
+    <string name="error_56_reason">Błąd serwera: odpowiedź niedostępna</string>
+    <string name="error_57_reason">Wewnętrzny błąd serwera</string>
+    <string name="error_100_reason">Brak odpowiedzi serwera</string>
+    <string name="error_101_reason">Dane logowania niekompletne</string>
+    <string name="error_102_reason">Nieprawidłowe dane logowania</string>
+    <string name="error_105_reason">Profil nie został ustawiony</string>
+    <string name="error_110_reason">Nieprawidłowy sposób logowania</string>
+    <string name="error_111_reason">Nie można wywołać metody logowania</string>
+    <string name="error_112_reason">Nie zaimplementowano</string>
+
+    <string name="error_115_reason">Brak uczniów przypisanych do konta</string>
+
+    <string name="error_120_reason">CODE_INTERNAL_LIBRUS_ACCOUNT_410</string>
+    <string name="error_121_reason">CODE_INTERNAL_LIBRUS_SYNERGIA_EXPIRED</string>
+    <string name="error_124_reason">Wymagane wypełnienie CAPTCHA</string>
+    <string name="error_125_reason">Problem z połączeniem</string>
+    <string name="error_126_reason">Nieprawidłowy identyfikator klienta</string>
+    <string name="error_127_reason">Wymagana akceptacja regulaminu</string>
+    <string name="error_128_reason">Błąd zmiany hasła</string>
+    <string name="error_129_reason">Wymagana zmiana hasła</string>
+    <string name="error_130_reason">Nieprawidłowe dane logowania</string>
+    <string name="error_131_reason">Inny błąd logowania do API</string>
+    <string name="error_132_reason">Brak tokenu CSRF</string>
+    <string name="error_133_reason">Konto LIBRUS nie zostało aktywowane</string>
+    <string name="error_134_reason">Inny błąd logowania do Portalu LIBRUS</string>
+    <string name="error_139_reason">Nie znaleziono tokenu Synergia</string>
+    <string name="error_140_reason">Token API wygasł</string>
+    <string name="error_141_reason">Niewystarczające uprawnienia</string>
+    <string name="error_142_reason">Inny błąd API</string>
+    <string name="error_143_reason">Odmowa dostępu do API</string>
+    <string name="error_144_reason">Nie znaleziono zasobu API</string>
+    <string name="error_145_reason">Brak danych</string>
+    <string name="error_146_reason">Plan lekcji nie jest publiczny</string>
+    <string name="error_147_reason">Brak dostępu do zasobu</string>
+    <string name="error_148_reason">Nieprawidłowe parametry</string>
+    <string name="error_149_reason">Nieprawidłowy zasób</string>
+    <string name="error_150_reason">Szczęśliwy numerek nie jest aktywny</string>
+    <string name="error_151_reason">Uwagi nie są publiczne</string>
+    <string name="error_152_reason">Brak tokenu logowania Synergia</string>
+    <string name="error_153_reason">Nieprawidłowy token logowania Synergia</string>
+    <string name="error_154_reason">Brak ID sesji Synergia</string>
+    <string name="error_155_reason">Brak dostępu do Wiadomości</string>
+    <string name="error_156_reason">Brak dostępu do Synergii</string>
+    <string name="error_157_reason">Brak ID sesji Wiadomości</string>
+    <string name="error_158_reason">Odmowa dostępu do Portalu Librus</string>
+    <string name="error_159_reason">API Portalu Librus wyłączone</string>
+    <string name="error_160_reason">Konto Synergia zostało rozłączone</string>
+    <string name="error_161_reason">Inny błąd Portalu Librus</string>
+    <string name="error_162_reason">Nie znaleziono konta Synergia</string>
+    <string name="error_163_reason">Inny błąd logowania do Portalu Librus</string>
+    <string name="error_164_reason">ERROR_LOGIN_LIBRUS_PORTAL_CODE_EXPIRED</string>
+    <string name="error_165_reason">ERROR_LOGIN_LIBRUS_PORTAL_CODE_REVOKED</string>
+    <string name="error_166_reason">ERROR_LOGIN_LIBRUS_PORTAL_NO_CLIENT_ID</string>
+    <string name="error_167_reason">ERROR_LOGIN_LIBRUS_PORTAL_NO_CODE</string>
+    <string name="error_168_reason">ERROR_LOGIN_LIBRUS_PORTAL_NO_REFRESH</string>
+    <string name="error_169_reason">ERROR_LOGIN_LIBRUS_PORTAL_NO_REDIRECT</string>
+    <string name="error_170_reason">ERROR_LOGIN_LIBRUS_PORTAL_UNSUPPORTED_GRANT</string>
+    <string name="error_171_reason">ERROR_LOGIN_LIBRUS_PORTAL_INVALID_CLIENT_ID</string>
+    <string name="error_172_reason">ERROR_LOGIN_LIBRUS_PORTAL_REFRESH_INVALID</string>
+    <string name="error_173_reason">ERROR_LOGIN_LIBRUS_PORTAL_REFRESH_REVOKED</string>
+    <string name="error_174_reason">ERROR_LIBRUS_SYNERGIA_OTHER</string>
+    <string name="error_175_reason">ERROR_LIBRUS_SYNERGIA_MAINTENANCE</string>
+
+    <string name="error_201_reason">ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_LOGIN</string>
+    <string name="error_202_reason">ERROR_LOGIN_MOBIDZIENNIK_WEB_OLD_PASSWORD</string>
+    <string name="error_203_reason">ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_DEVICE</string>
+    <string name="error_204_reason">ERROR_LOGIN_MOBIDZIENNIK_WEB_ARCHIVED</string>
+    <string name="error_205_reason">ERROR_LOGIN_MOBIDZIENNIK_WEB_MAINTENANCE</string>
+    <string name="error_206_reason">ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_ADDRESS</string>
+    <string name="error_210_reason">ERROR_LOGIN_MOBIDZIENNIK_WEB_OTHER</string>
+    <string name="error_211_reason">ERROR_MOBIDZIENNIK_WEB_ACCESS_DENIED</string>
+    <string name="error_212_reason">ERROR_MOBIDZIENNIK_WEB_NO_SESSION_KEY</string>
+    <string name="error_216_reason">ERROR_MOBIDZIENNIK_WEB_NO_SESSION_VALUE</string>
+    <string name="error_213_reason">ERROR_MOBIDZIENNIK_WEB_NO_SERVER_ID</string>
+    <string name="error_214_reason">ERROR_MOBIDZIENNIK_WEB_INVALID_RESPONSE</string>
+    <string name="error_215_reason">ERROR_LOGIN_MOBIDZIENNIK_WEB_NO_SESSION_ID</string>
+
+    <string name="error_301_reason">ERROR_LOGIN_VULCAN_INVALID_SYMBOL</string>
+    <string name="error_302_reason">ERROR_LOGIN_VULCAN_INVALID_TOKEN</string>
+    <string name="error_309_reason">ERROR_LOGIN_VULCAN_INVALID_PIN</string>
+    <string name="error_310_reason">ERROR_LOGIN_VULCAN_INVALID_PIN_0_REMAINING</string>
+    <string name="error_311_reason">ERROR_LOGIN_VULCAN_INVALID_PIN_1_REMAINING</string>
+    <string name="error_312_reason">ERROR_LOGIN_VULCAN_INVALID_PIN_2_REMAINING</string>
+    <string name="error_321_reason">ERROR_LOGIN_VULCAN_EXPIRED_TOKEN</string>
+    <string name="error_322_reason">ERROR_LOGIN_VULCAN_OTHER</string>
+    <string name="error_330_reason">ERROR_LOGIN_VULCAN_ONLY_KINDERGARTEN</string>
+    <string name="error_331_reason">ERROR_LOGIN_VULCAN_NO_PUPILS</string>
+    <string name="error_340_reason">ERROR_VULCAN_API_MAINTENANCE</string>
+    <string name="error_341_reason">ERROR_VULCAN_API_BAD_REQUEST</string>
+    <string name="error_342_reason">ERROR_VULCAN_API_OTHER</string>
+
+    <string name="error_401_reason">ERROR_LOGIN_IDZIENNIK_WEB_INVALID_LOGIN</string>
+    <string name="error_402_reason">ERROR_LOGIN_IDZIENNIK_WEB_INVALID_SCHOOL_NAME</string>
+    <string name="error_403_reason">ERROR_LOGIN_IDZIENNIK_WEB_PASSWORD_CHANGE_NEEDED</string>
+    <string name="error_404_reason">ERROR_LOGIN_IDZIENNIK_WEB_MAINTENANCE</string>
+    <string name="error_405_reason">ERROR_LOGIN_IDZIENNIK_WEB_SERVER_ERROR</string>
+    <string name="error_410_reason">ERROR_LOGIN_IDZIENNIK_WEB_OTHER</string>
+    <string name="error_411_reason">ERROR_LOGIN_IDZIENNIK_WEB_API_NO_ACCESS</string>
+    <string name="error_420_reason">ERROR_LOGIN_IDZIENNIK_WEB_NO_SESSION</string>
+    <string name="error_421_reason">ERROR_LOGIN_IDZIENNIK_WEB_NO_AUTH</string>
+    <string name="error_422_reason">ERROR_LOGIN_IDZIENNIK_WEB_NO_BEARER</string>
+    <string name="error_430_reason">ERROR_IDZIENNIK_WEB_ACCESS_DENIED</string>
+    <string name="error_431_reason">ERROR_IDZIENNIK_WEB_OTHER</string>
+    <string name="error_432_reason">ERROR_IDZIENNIK_WEB_MAINTENANCE</string>
+    <string name="error_433_reason">ERROR_IDZIENNIK_WEB_SERVER_ERROR</string>
+    <string name="error_434_reason">ERROR_IDZIENNIK_WEB_PASSWORD_CHANGE_NEEDED</string>
+    <string name="error_440_reason">ERROR_LOGIN_IDZIENNIK_FIRST_NO_SCHOOL_YEAR</string>
+    <string name="error_441_reason">ERROR_IDZIENNIK_WEB_REQUEST_NO_DATA</string>
+    <string name="error_450_reason">ERROR_IDZIENNIK_API_ACCESS_DENIED</string>
+    <string name="error_451_reason">ERROR_IDZIENNIK_API_OTHER</string>
+
+    <string name="error_801_reason">ERROR_TEMPLATE_WEB_OTHER</string>
+
+    <string name="error_900_reason">EXCEPTION_API_TASK</string>
+    <string name="error_901_reason">EXCEPTION_LOGIN_LIBRUS_API_TOKEN</string>
+    <string name="error_902_reason">EXCEPTION_LOGIN_LIBRUS_PORTAL_TOKEN</string>
+    <string name="error_903_reason">EXCEPTION_LIBRUS_PORTAL_SYNERGIA_TOKEN</string>
+    <string name="error_904_reason">EXCEPTION_LIBRUS_API_REQUEST</string>
+    <string name="error_905_reason">EXCEPTION_LIBRUS_SYNERGIA_REQUEST</string>
+    <string name="error_906_reason">EXCEPTION_MOBIDZIENNIK_WEB_REQUEST</string>
+    <string name="error_907_reason">EXCEPTION_VULCAN_API_REQUEST</string>
+    <string name="error_910_reason">EXCEPTION_NOTIFY_AND_SYNC</string>
+    <string name="error_911_reason">EXCEPTION_LIBRUS_MESSAGES_REQUEST</string>
+    <string name="error_912_reason">EXCEPTION_IDZIENNIK_WEB_REQUEST</string>
+    <string name="error_913_reason">EXCEPTION_IDZIENNIK_WEB_API_REQUEST</string>
+    <string name="error_914_reason">EXCEPTION_IDZIENNIK_API_REQUEST</string>
+
+    <string name="error_1201_reason">Nie podano parametrów</string>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2e711d11..462eaece 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1023,4 +1023,5 @@
     <string name="dialog_event_manual_date_next_week">następny %s (%s)</string>
     <string name="dialog_event_manual_no_lessons">Nie ma lekcji tego dnia</string>
     <string name="dialog_profile_remove_success">Profil został usunięty.</string>
+    <string name="snackbar_error_text">Wystąpił błąd</string>
 </resources>