diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt
index 7ca226d3..94930aed 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt
@@ -116,6 +116,7 @@ const val ERROR_LOGIN_LIBRUS_MESSAGES_INVALID_LOGIN         = 179
 const val ERROR_LOGIN_LIBRUS_PORTAL_INVALID_LOGIN           = 180
 const val ERROR_LIBRUS_API_MAINTENANCE                      = 181
 const val ERROR_LIBRUS_PORTAL_MAINTENANCE                   = 182
+const val ERROR_LIBRUS_API_NOTICEBOARD_PROBLEM              = 183
 
 const val ERROR_LOGIN_MOBIDZIENNIK_WEB_INVALID_LOGIN        = 201
 const val ERROR_LOGIN_MOBIDZIENNIK_WEB_OLD_PASSWORD         = 202
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/LibrusApi.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/LibrusApi.kt
index aa3db971..ed9c98d5 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/LibrusApi.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/LibrusApi.kt
@@ -63,6 +63,7 @@ open class LibrusApi(open val data: DataLibrus) {
                         "NotesIsNotActive" -> ERROR_LIBRUS_API_NOTES_NOT_ACTIVE
                         "InvalidRequest" -> ERROR_LIBRUS_API_INVALID_REQUEST_PARAMS
                         "Nieprawidłowy węzeł." -> ERROR_LIBRUS_API_INCORRECT_ENDPOINT
+                        "NoticeboardProblem" -> ERROR_LIBRUS_API_NOTICEBOARD_PROBLEM
                         else -> ERROR_LIBRUS_API_OTHER
                     }.let { errorCode ->
                         if (errorCode !in ignoreErrors) {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/api/LibrusApiAnnouncementMarkAsRead.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/api/LibrusApiAnnouncementMarkAsRead.kt
index b36721f1..de265741 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/api/LibrusApiAnnouncementMarkAsRead.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/librus/data/api/LibrusApiAnnouncementMarkAsRead.kt
@@ -6,12 +6,13 @@ package pl.szczodrzynski.edziennik.data.api.edziennik.librus.data.api
 
 import org.greenrobot.eventbus.EventBus
 import pl.szczodrzynski.edziennik.data.api.ERROR_LIBRUS_API_INVALID_REQUEST_PARAMS
+import pl.szczodrzynski.edziennik.data.api.ERROR_LIBRUS_API_NOTICEBOARD_PROBLEM
 import pl.szczodrzynski.edziennik.data.api.POST
 import pl.szczodrzynski.edziennik.data.api.edziennik.librus.DataLibrus
 import pl.szczodrzynski.edziennik.data.api.edziennik.librus.data.LibrusApi
 import pl.szczodrzynski.edziennik.data.api.events.AnnouncementGetEvent
-import pl.szczodrzynski.edziennik.data.db.full.AnnouncementFull
 import pl.szczodrzynski.edziennik.data.db.entity.Metadata
+import pl.szczodrzynski.edziennik.data.db.full.AnnouncementFull
 
 class LibrusApiAnnouncementMarkAsRead(
         override val data: DataLibrus,
@@ -24,7 +25,10 @@ class LibrusApiAnnouncementMarkAsRead(
 
     init {
         apiGet(TAG, "SchoolNotices/MarkAsRead/${announcement.idString}", method = POST,
-                ignoreErrors = listOf(ERROR_LIBRUS_API_INVALID_REQUEST_PARAMS)) {
+                ignoreErrors = listOf(
+                        ERROR_LIBRUS_API_INVALID_REQUEST_PARAMS,
+                        ERROR_LIBRUS_API_NOTICEBOARD_PROBLEM
+                )) {
             announcement.seen = true
 
             EventBus.getDefault().postSticky(AnnouncementGetEvent(announcement))
diff --git a/app/src/main/res/values/errors.xml b/app/src/main/res/values/errors.xml
index 7aeabb87..00d6a4e3 100644
--- a/app/src/main/res/values/errors.xml
+++ b/app/src/main/res/values/errors.xml
@@ -90,6 +90,7 @@
     <string name="error_180" translatable="false">ERROR_LOGIN_LIBRUS_PORTAL_INVALID_LOGIN</string>
     <string name="error_181" translatable="false">ERROR_LIBRUS_API_MAINTENANCE</string>
     <string name="error_182" translatable="false">ERROR_LIBRUS_PORTAL_MAINTENANCE</string>
+    <string name="error_183" translatable="false">ERROR_LIBRUS_API_NOTICEBOARD_PROBLEM</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>
@@ -256,6 +257,7 @@
     <string name="error_180_reason">Librus Portal: nieprawidłowe dane logowania</string>
     <string name="error_181_reason">Librus API: przerwa techniczna</string>
     <string name="error_182_reason">Librus Portal: przerwa techniczna</string>
+    <string name="error_183_reason">Wystąpił problem z tablicą ogłoszeń</string>
 
     <string name="error_201_reason">Nieprawidłowy login lub hasło</string>
     <string name="error_202_reason">Podano stare hasło</string>