Database is no longer recognised

After restarting my Mac 11.3.1 (20E241), all my literature is no longer recognised. It just says: "Es ist ein Fehler aufgetreten"

ID: 21296324

This is an old discussion that has not been active in a long time. Before commenting here, you should strongly consider starting a new discussion instead. If you think the content of this discussion is still relevant, you can link to it from your new discussion.

This discussion has been closed.