I’ve been using Manjaro GNOME for years and “Deja-Dup” for my backups.
After the last update to GNOME 49.2, “Deja-Dup” is now at version 49.2-1 and “Duplicity” at version 3.0.6.3-1, which causes the error “Unable to process Duplicity version” when starting a backup.
Downgrading the “Duplicity” version to 3.0.5.1-1 resolves the issue, and backups can now be performed without problems.
How should we proceed to permanently resolve this problem?
Best regards.
LLUISPARCET
This is a guess - have you tried opening your config and let the app migrate the configs?
On a side note: I lower-cased the topic title - as using all uppercase is considered shouting - and you don’t shout - right?
This is a post more suited to the update thread assuming the update went smoothly and that this is a result of a fully updated system…
I do, occasionally, but I’m not much into the pub ritual. 
Thank you for changing the title from uppercase to lowercase; it’s clear we weren’t shouting. Writing in all caps in email titles or subjects is an occupational hazard; it was standard practice at my company. I certainly didn’t want to give the impression that I was shouting.
The settings for the “Deja-dup” app are correct; I understand they migrated automatically without any intervention on my part.
I also confirm that my system is fully updated and that the recent update to GNOME 49 didn’t cause any problems. If a moderator thinks this thread should be moved to the system updates section, I have no objection.
Mod edit:- Topic moved to a more appropriate category. No charge.
Hi, I had the same problem and was able to solve it by installing the python-pexpect package:
yay -S python-pexpect
Fixed with today’s update to Duplicity (3.0.6.3-2), which installs python-ptyprocess (0.7.0-8) and python-pexpect (4.9.0-4) as dependencies.
Thanks everyone.