After update to 2.0.8 Error-Duplicati.Library.Main.Operation.BackupHandler-FatalError

Alright, so I could fix it. Very easily. I think you were right about the “changed host key”.

Solution: Open Duplicati, edit the configurations of your backup, then go to Destination and hit Test connection, you will get a modal that offers to change the host key, hit OK and save the settings. Manually trigger a backup job and everything should work again.

Thanks for your help!