I'm posting this here because I think this issue is not really related to an issue with Backups - deja-dup.
I ran deja-dup using the Backups front end. It appears that it ran for quite awhile before having an error, because many of the files in the backup folder have today's date. Here is the error message:
Permission denied when trying to read ‘/duplicity-inc.20210211T163154Z.to.20210415T001733Z.manifest.gpg’.
The second problem may or may not be related to the first one. Whenever I start up Backups, it says that it has been 178 days or more since the last backup when, in fact, it has been a week. The backups have a weekly schedule. I'm thinking that every backup has actually failed thereby causing the count of days since the last backup to continue advancing.
If I remember correctly, Backups does not ask for the password so it must not be running with admin privileges. I just tried to verify this, but right now Backups' 'Backup right now' button is disabled.
Suggestions for my next step will be appreciated.