You can fix this warning issue by looking into the following things:
- Ensure you have write access to the .config/filezilla directory and its files. Fix permissions if needed using the following commands:
chmod 755 ~/.config/filezilla
chmod 644 ~/.config/filezilla/queue.sqlite3
- Close FileZilla and Kill Stale Processes using the following command:
kill -9 [PID]
PID is the PID of FileZilla.
- Rename or delete the corrupted queue file using the following command:
mv ~/.config/filezilla/queue.sqlite3 ~/.config/filezilla/queue.sqlite3.bak
These steps should fix the issue.