I am using Studio on an M1 Mac mini running Sonoma.
Studio crashed and on reopening it my library was no longer showing, nor were Qobuz or HRA Stream.
I managed to add the streaming services back.
I then added my own music folder in local settings and synced. There was no library showing. When I now search in my own library it is showing 2 of every album.
Do you have playlist that you need to keep? If so you need to retrieve your sqlite file from your backup (unless you have a database backup) Delete your existing (bad) sqlite and replace it with your backup version.
If you’re not worried about your playlist you can navigate to your library database location and delete the sqlite file and Audirvana will create a new one upon your next application launch.
You can see your library database location in the settings.