diff --git a/src/main/java/org/olat/modules/gotomeeting/model/GoToErrors.java b/src/main/java/org/olat/modules/gotomeeting/model/GoToErrors.java
index 0c0d7aa1685c28797ce76b82cfed17090e6ffb83..7cbbfd22d6208baba4ea1695b2458fbcae2aab5e 100644
--- a/src/main/java/org/olat/modules/gotomeeting/model/GoToErrors.java
+++ b/src/main/java/org/olat/modules/gotomeeting/model/GoToErrors.java
@@ -31,6 +31,7 @@ public enum GoToErrors {
 	OrganizerOverlap("error.organizer.overbooked"),
 	TrainingOver("error.code.TrainingOver"),
 	InvalidRequest("error.code.unkown"),
+	InvalidToken("error.code.InvalidToken"),
 	NoSuchTraining("error.code.NoSuchTraining"),
 	TrainingInSession("error.code.TrainingInSession"),
 	InvalidTrainingDatesMaxDuration("error.code.InvalidTrainingDatesMaxDuration");
diff --git a/src/main/java/org/olat/modules/gotomeeting/ui/_i18n/LocalStrings_de.properties b/src/main/java/org/olat/modules/gotomeeting/ui/_i18n/LocalStrings_de.properties
index e2d4e530e3383f54a9a74bcdac5aeeb71fdfaa89..a20f43f5aef47d14fab7cb490d08a2f9db2c7c27 100644
--- a/src/main/java/org/olat/modules/gotomeeting/ui/_i18n/LocalStrings_de.properties
+++ b/src/main/java/org/olat/modules/gotomeeting/ui/_i18n/LocalStrings_de.properties
@@ -8,6 +8,7 @@ confirm.delete.meeting=Wollen Sie die Schulung "{0}" wirklich l\u00F6schen?
 confirm.remove.organizer=Wollen Sie den Organizer "{0}" von dem OpenOLAT System entfernen?
 download=Herunterladen
 enabled=
+error.code.InvalidToken=Die Authentifizierung Ihres Organizers ist wahrscheinlich nicht mehr g\u00FCltig und muss erneuert werden. Bitte fragen Sie ihren Administrator, um dies zu \u00FCberpr\u00FCfen.
 error.code.InvalidTrainingDatesMaxDuration=Die Schulung k\u00F6nnen nicht l\u00E4nger als 24 Stunden dauern.
 error.code.NoSuchTraining=Die Schulung konnte nicht gefunden werden.
 error.code.TrainingInSession=Training schon gestartet
diff --git a/src/main/java/org/olat/modules/gotomeeting/ui/_i18n/LocalStrings_en.properties b/src/main/java/org/olat/modules/gotomeeting/ui/_i18n/LocalStrings_en.properties
index 2e855b3c8645efd5e82e4629014338b14f8296c2..6c6fe78b55a21072223491b09beab2e1919972ff 100644
--- a/src/main/java/org/olat/modules/gotomeeting/ui/_i18n/LocalStrings_en.properties
+++ b/src/main/java/org/olat/modules/gotomeeting/ui/_i18n/LocalStrings_en.properties
@@ -8,6 +8,7 @@ confirm.delete.meeting=Do you really want to delete the following meeting "{0}"?
 confirm.remove.organizer=Do you really want to remove the organizer "{0}"?
 download=Download
 enabled=
+error.code.InvalidToken=The authentication of the organizer is probably not valid and need to be renewed. Please, ask your administrator to verify it.
 error.code.InvalidTrainingDatesMaxDuration=The training can not last longer than 24 hours.
 error.code.NoSuchTraining=The training cannot be found.
 error.code.TrainingInSession=Training already started