Restore Backup Fail with Error: Unknown error, see supervisor

My haos is running in a virtual machine. I tried to remove duckdns, and part of that was removing the duckdns https address out of the configuration.yaml file. Since then I have not been able to access either the ip address or homeassistant.local:8123. When I try to restore a backup this happens:

And did you check supervisor ? what is the error ?

Here is some linux supervisor help:

The supervisor says that it is only a partial backup. Can I restore a partial backup?

Considering it is an error, no you cant.