Hi,
ah, so there is a video, thats how another user ended up in a similar situation… No one should use that video to upgrade a production system, things will break, it’s only for testing and the information is outdated.
The video note states that this upgrade path is still in Beta status and actively worked on. It is therefore unclear which test version from the test app center was run when you tried to update.
I would strongly suggest that you go back to a backup if available. If thats not possible, i would try the following, completely untested and unverified steps, after creating a backup or snapshot:
- uninstall the current owncloud app version
- Switch back to the production app center with
univention-app dev-use-test-appcenter --revert, you may have to installunivention-appcenter-dev - Install the productive owncloud app version (should be 9.1.1) and debug further from there.