Problem syncing calendar and contacts


I have problems syncing Nextcloud on Android. I am using Davx5, two-factor-authentification and app-specific passwords. The error message I am getting is “no caldav or carddav service could be found”.

I have tried unsuccessfully:

  • upgrading Nextcloud from 15.0.4 to 15.0.7
  • temporarily deactivating 2FA and using the login password
  • creating another user account
  • using another Nextcloud instance (also with another hoster)
  • using different app passwords
  • using app carddav sync instead of davx5 on Android

Is there anyone who can help?