means what it says, but what’s not clear is when the repair ran, or whether communication error was involved. As a side note, I had my Wi-Fi fail this morning, and a backup failure, but no issue next time.
Do you have auto-cleanup set in Advanced options? That can run the Repair before backup if needed.
and if you don’t use that, then you might need to check history to see when Repair ran, and how it failed.
Once a Repair is attempt and does not complete successfully, chances are it won’t the next time it tries.
Do you have a complete working backup when your communications are working? If so, maybe set up a log-file at log-file-log-level=retry to collect info for whenever next failure happens, or set up a new backup, get it working, then see if you can break it with at least that amount of logging going, to see how it breaks.