Nextcloud Notes for Android cannot sync

Nextcloud server version: 27.1.4.1
Android Nextcloud Notes app: version 4.1.0

Recently, I discovered that I cannot sync my Notes with Nextcloud anymore. The error message says ÔÇśSynchronisierung fehlgeschlagenÔÇÖ (synchronization failed).

An older post with the same issue recommends to clear the appÔÇÖs storage. I hesitate since I have some local unsynced changes.

The error details on the Notes app:

App Version: 4.1.0
App Version Code: 40010090
App Flavor: fdroid

Files App Version Code: 30260090 (PROD)

---

OS Version: 4.9.337-perf+(eng.root.20231109.175008)
OS API Level: 32
Device: FP3
Manufacturer: Fairphone
Model (and Product): FP3 (lineage_FP3)

---

java.lang.Exception: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.pushLocalChanges(NotesServerSyncTask.java:145)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.run(NotesServerSyncTask.java:94)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:920)


java.lang.Exception: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.pushLocalChanges(NotesServerSyncTask.java:145)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.run(NotesServerSyncTask.java:94)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:920)


java.lang.Exception: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.pushLocalChanges(NotesServerSyncTask.java:158)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.run(NotesServerSyncTask.java:94)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:920)


java.lang.Exception: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.pushLocalChanges(NotesServerSyncTask.java:158)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.run(NotesServerSyncTask.java:94)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:920)


java.lang.Exception: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.pushLocalChanges(NotesServerSyncTask.java:158)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.run(NotesServerSyncTask.java:94)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:920)


java.lang.Exception: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.pushLocalChanges(NotesServerSyncTask.java:158)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.run(NotesServerSyncTask.java:94)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:920)


java.lang.Exception: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.pushLocalChanges(NotesServerSyncTask.java:158)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.run(NotesServerSyncTask.java:94)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:920)


java.lang.RuntimeException: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at io.reactivex.internal.util.ExceptionHelper.wrapOrThrow(ExceptionHelper.java:46)
	at io.reactivex.internal.observers.BlockingMultiObserver.blockingGet(BlockingMultiObserver.java:93)
	at io.reactivex.Maybe.blockingGet(Maybe.java:2321)
	at io.reactivex.Observable.blockingSingle(Observable.java:5381)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.pullRemoteChanges(NotesServerSyncTask.java:219)
	at it.niedermann.owncloud.notes.persistence.NotesServerSyncTask.run(NotesServerSyncTask.java:96)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:920)
Caused by: com.nextcloud.android.sso.exceptions.TokenMismatchException: Der Authentifizierungs-Token stimmt nicht ├╝berein oder dem Paketnamen fehlt die Berechtigung f├╝r diese Aktion
	at com.nextcloud.android.sso.api.AidlNetworkRequest.performNetworkRequestV2(AidlNetworkRequest.java:197)
	at com.nextcloud.android.sso.api.NextcloudAPI.performNetworkRequestV2(NextcloudAPI.java:180)
	at com.nextcloud.android.sso.api.NextcloudAPI.lambda$performRequestObservableV2$0$com-nextcloud-android-sso-api-NextcloudAPI(NextcloudAPI.java:122)
	at com.nextcloud.android.sso.api.NextcloudAPI$$ExternalSyntheticLambda0.subscribe(Unknown Source:6)
	at io.reactivex.internal.operators.observable.ObservableFromPublisher.subscribeActual(ObservableFromPublisher.java:31)
	at io.reactivex.Observable.subscribe(Observable.java:12284)
	at io.reactivex.internal.operators.observable.ObservableSingleMaybe.subscribeActual(ObservableSingleMaybe.java:31)
	at io.reactivex.Maybe.subscribe(Maybe.java:4290)
	at io.reactivex.Maybe.blockingGet(Maybe.java:2320)
	... 8 more


Can you open the Nextcloud app (not the Notes app) and confirm it connects alright without error then re-attempt to sync from the Notes app?

The Nextcloud app syncs without error. I saved some imported notes, deleted the notes app data, the notes app syncs again without error, I restored the saved apps.

The effort was 10 minutes work for me, for a non-tech user it would be a major problem.

There have been other reports. Its usually been traced to either a past device migration or recent authentication change.

I have a similar sync Problem, in addition after sync Error many copies of new created notes are created Up to over 100.
My solution was deinstall ver. 4.1.0 and install 4.1.0 RC1 from F-Droid. This work perfectly for me on 2 devices.
(I already created a Issue on Github)