Backup failed, unknown error

Good morning
since a couple of days deja dup backups regularly fail with “unknown error”: how can I troubleshoot? backup destination (an smb folder) is reachable and there is space available
thank you!

Hello! That’s frustrating, sorry that Deja Dup is giving you a hassle.

Try running it like so:

DEJA_DUP_DEBUG=1 deja-dup

or

DEJA_DUP_DEBUG=1 flatpak run org.gnome.DejaDup

and then reproduce the issue - you should see a lot more output, hopefully some of it is even helpful!

thank you very much!