[horde] Problems with CalDAV

[Ralph Ballier]

  Hello,

I've tried a lot. I have also looked into the bitfire forums. There  
are articles about this error, but all write that it is a problem of  
horde.

What can I do?

Here again the error message on the mobile phone with Android 7.0:

--- BEGIN DEBUG INFO ---
SYNCHRONIZATION INFO
Synchronization phase: 7
Account name: ballier at mail.xxxxx.yy
Authority: com.android.calendar

REMOTE RESOURCE:
https://horde.xxxxx.yy/rpc.php/calendars/ba/calendar~07jceIEdrE-3DNaogacFLkE/[1]

EXCEPTION:
at.bitfire.dav4android.exception.InvalidDavResponseException: Expected  
207 Multi-Status, got 200 OK
        at  
at.bitfire.dav4android.DavResource.assertMultiStatus(DavResource.kt:341)
        at at.bitfire.dav4android.DavCalendar.calendarQuery(DavCalendar.kt:90)
        at  
at.bitfire.davdroid.syncadapter.CalendarSyncManager.listRemote(CalendarSyncManager.kt:108)
        at  
at.bitfire.davdroid.syncadapter.SyncManager.performSync(SyncManager.kt:145)
        at  
at.bitfire.davdroid.syncadapter.CalendarsSyncAdapterService$SyncAdapter.sync(CalendarsSyncAdapterService.kt:54)
        at  
at.bitfire.davdroid.syncadapter.SyncAdapterService$SyncAdapter.onPerformSync(SyncAdapterService.kt:62)
        at  
android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:272)


Links:
------
[1]  
https://horde.schule.de/rpc.php/calendars/ba/calendar~07jceIEdrE-3DNaogacFLkE/