Retrieving Yandex.Disk app logs
Archive the contents of the .sync folder and attach the archive to the feedback form or to your email.
If the program doesn't start, send the file /.config/yandex-disk/crash.txt to support.
Tip. If you can't attach the archive to the email, upload it to your Yandex.Disk through your browser and provide a public link to it in your email.