Error: The socket has been shut down

Kind of your call, however you just made it through something similar to its pre-backup verification.
One good thing to do if you don’t do it regularly is to see if database recreates from the destination.
I know you have backup of DB, but testing recreate may also add confidence that restore will work.
If you decide to do this, you can move your DB aside again (keep track of which is which). Repair.
Seeing no database, this will recreate one, ideally from dlist files, then dindex, and no dblock files.
You could watch in About → Show log → Live → Information, or Verbose if you want more details.
Alternatively, watch the progress bar. Anything past 70% is dblock files, and past 90% can get lots.

EDIT:

Testing restore occasionally is also too. You don’t want to find out too late that restores don’t work.
People who don’t backup the DB can do partial DB recreates with Direct restore from backup files.
Your case is different. You probably have a backup DB that can backup, but can it restore as well?

Or if you prefer not to be cautious, I guess you can just see if backup runs. Regarding dlist files, it appears that your last one is May 31, and nothing went up since then, so maybe nothing needs fix.