"Unknown error, see supervisor" on restore backup

My installation is on a VM, after a PC restart it apparently don’t boot.

So I create a new VM and logged in Google Drive for restore a backup.

When i click Restore i see this:
image

I try to look at Log but there is nothing:

I’m don’t remember if backup has a password (i think no) and, in case, the value of the password. Is there any way to confirm if there is a password?