Ya, I checked the DNS, although gpg error code for DNS resolution error is different from the one I get. I usually set my DNS to ISP provider to reduce lag, but I also tried setting up to the google 8.8.8.8 configuration but it didn’t work.
Sure, I am using it already for my home drive, however, DejaDup expects you to know what system files to backup, which means I would need to do a lot fo bg reading to figure out how to take incremental snapshots of the system files into order to get a decent backup to which I can roll back to in case an upgrade goes wrong.
Timeshift takes care of that for you. Ultimately I want to be able to do backups of my system files onto a dedicated encrypted USB flash drive.
Do you use DejaDup for system backup? Which files are you backing up?