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Hi everyone,I'm currently implementing push notifications in a Mendix Native Mobile application using Firebase Cloud Messaging.Everything works correctly(just for token generation) on iOS, but on Android, the action GetPushNotificationToken does not return a token and instead throws the following error:ERROR: [messaging/unknown] java.io.IOException: java.util.concurrent.ExecutionException: java.io.IOException: FIS_AUTH_ERROR ContextMendix Native Mobile appUsing Firebase Cloud MessagingiOS token is generated correctlyAndroid returns empty token with FIS_AUTH_ERRORTesting on real Android deviceUsing custom native build (not only Make It Native)Each app environment has its own Firebase project:MakeItNative → separate Firebase projectFleet Acceptance → own Firebase projectFirebase configuration:google-services.json generated from Firebase projectPackage name matches the Android App IdentifierSHA-1 fingerprint added in FirebaseFirebase Admin SDK configured in Mendix for sending notificationsAdditional warning in Android logsWe also see this warning:registerHeadlessTask or registerCancellableHeadlessTask called multiple times for same key 'ReactNativeFirebaseMessagingHeadlessTask' What we already triedVerified Firebase configurationVerified package name matches FirebaseRegenerated google-services.jsonRebuilt native Android appReinstalled app on deviceConfirmed iOS works with same logicConfirmed PushNotifications.DeviceRegistration sync is enabledConfirmed OnPageLoad_RegisterPushNotifications nanoflow is executedQuestionHas anyone encountered FIS_AUTH_ERROR when calling GetPushNotificationToken in a Mendix Native app?Could this be caused by:incorrect Firebase Android configuration?conflict between Make It Native Firebase config and custom app config?duplicate registration of ReactNativeFirebaseMessagingHeadlessTask?missing SHA fingerprint configuration?incorrect integration of @react-native-firebase/messaging inside Mendix Native Builder?Any guidance would be greatly appreciated.Thanks!

asked 2026-04-21

0 answers