I recall this post of yours: Seafile Client 8.0.7. not working on MacOS 12.4. Monterey
So you managed to install the client and now, after a few days of operation, it “forgot” your libraries. Is this what happened? Or are we talking different machines?
This is what I would do - proceed to the next if the previous step did not prove successful:
- Shutdown the client entirely
- Uninstall client (using Trashbin on Mac or Windows Settings on Windows 10/11) and reinstall it
- Uninstall client, purge app directory manually, and reinstall client