DavdoridLog

[info ] Preparing synchronization
[info ] Querying capabilities
[debug] Received <response> for https://xxxxxxxxxxxxxxxxxxxx, status: null, properties: [displayname(DAV:): DisplayName(displayName=Arbeit),
getctag(http://calendarserver.org/ns/): GetCTag(cTag=61),
calendar-color(http://apple.com/ns/ical/): CalendarColor(color=null)]
[info ] Setting task list name and color (if available)
[info ] Processing locally deleted entries
[info ] Locally preparing dirty entries
[info ] Uploading dirty entries
[info ] Checking sync state
[info ] Listing local entries
[debug] Found local resource: fdaf8a1c-078f-4f06-83b9-6e12561b1af3.ics
[debug] Found local resource: aec82c59e049164687426fd9a8f5b7f2ea077ba20013a3da40b9fba0393424f1.ics
[debug] Found local resource: 8423ff02-49a4-41f0-9d89-d9bbdd1766b8.ics
[info ] Listing remote entries
[debug] Received <response> for https://xxxxxxxxxxxxxxxxxxxxxxx.ics, status: null, properties: [getetag(DAV:): GetETag(eTag=467b89dd6ff75cae5aa3e9d35ebcf337)]
[debug] Found remote VTODO: 7a1626ca-4e51-4da6-8e96-b0f2567e11b8.ics
[info ] Comparing local/remote entries
[info ] 8423ff02-49a4-41f0-9d89-d9bbdd1766b8.ics is not on server anymore, deleting
[info ] aec82c59e049164687426fd9a8f5b7f2ea077ba20013a3da40b9fba0393424f1.ics is not on server anymore, deleting
[info ] fdaf8a1c-078f-4f06-83b9-6e12561b1af3.ics is not on server anymore, deleting
[info ] New resources have been found on the server: 7a1626ca-4e51-4da6-8e96-b0f2567e11b8.ics
[info ] Downloading remote entries
[info ] Downloading 1 tasks (30 at once)
[info ] Downloading https://xxxxxxxxxxxxxxxxxxxxx.ics
[info ] Adding 7a1626ca-4e51-4da6-8e96-b0f2567e11b8.ics to local task list
[error] Unknown sync error - EXCEPTION:
java.lang.NullPointerException: timezone is null!
	at android.os.Parcel.readException(Parcel.java:1437)
	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:185)
	at android.database.DatabaseUtils.readExceptionWithOperationApplicationExceptionFromParcel(DatabaseUtils.java:160)
	at android.content.ContentProviderProxy.applyBatch(ContentProviderNative.java:484)
	at android.content.ContentProviderClient.applyBatch(ContentProviderClient.java:227)
	at at.bitfire.ical4android.BatchOperation.commit(BatchOperation.java:50)
	at at.bitfire.ical4android.AndroidTask.add(AndroidTask.java:228)
	at at.bitfire.davdroid.syncadapter.TasksSyncManager.processVTodo(TasksSyncManager.java:213)
	at at.bitfire.davdroid.syncadapter.TasksSyncManager.downloadRemote(TasksSyncManager.java:148)
	at at.bitfire.davdroid.syncadapter.SyncManager.performSync(SyncManager.java:182)
	at at.bitfire.davdroid.syncadapter.TasksSyncAdapterService$SyncAdapter.onPerformSync(TasksSyncAdapterService.java:63)
	at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:254)
java.lang.NullPointerException: timezone is null!
	at android.os.Parcel.readException(Parcel.java:1437)
	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:185)
	at android.database.DatabaseUtils.readExceptionWithOperationApplicationExceptionFromParcel(DatabaseUtils.java:160)
	at android.content.ContentProviderProxy.applyBatch(ContentProviderNative.java:484)
	at android.content.ContentProviderClient.applyBatch(ContentProviderClient.java:227)
	at at.bitfire.ical4android.BatchOperation.commit(BatchOperation.java:50)
	at at.bitfire.ical4android.AndroidTask.add(AndroidTask.java:228)
	at at.bitfire.davdroid.syncadapter.TasksSyncManager.processVTodo(TasksSyncManager.java:213)
	at at.bitfire.davdroid.syncadapter.TasksSyncManager.downloadRemote(TasksSyncManager.java:148)
	at at.bitfire.davdroid.syncadapter.SyncManager.performSync(SyncManager.java:182)
	at at.bitfire.davdroid.syncadapter.TasksSyncAdapterService$SyncAdapter.onPerformSync(TasksSyncAdapterService.java:63)
	at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:254)