I’ve installed DejaDup via Flatpak and have been using it for a few years to successfully make backups; after installing the latest Flatpak (version 47.0, commit bf253158092d38e98151c0c0d458aeb01dd59c1576b9ec40e45fecbcb791481e), every time it tries to make a backup, it just presents an error message that says “Could not understand duplicity version”.
Rolling back to the previous release, dc5cc7a2dcfa43eae22dfc2ef1fc09af7d27a0192cc05e2ad15aac4bffc99614, seems to work around the problem.
Thankfully(?) I can’t reproduce, and this is the first report I’ve seen since releasing 47 a couple weeks ago - so I don’t think the flatpak is entirely broken.
But also, it’s very strange that there would be differences! The flatpak ships its own duplicity … so … why would there be a problem…
Can you run this command and paste the output?
flatpak run --command=duplicity org.gnome.DejaDup --version
So… I just updated to the latest version again, and now it’s working! Just for reference, the output of that command is:
duplicity 3.0.2 August 09, 2024
I haven’t been able to reproduce the previous error I was having, which is good, but I’m not sure how it would have gotten into a bad state in the first place.
Hitting the same issue after updating. Tried completely removing and reinstalling the flatpak and verified I’m on “duplicity 3.0.2 August 09, 2024”.
Working after rolling back to the prior commit. Will try updating again like @Minneyar once the current backup completes.
Ok, here’s something interesting – today, my automated backup failed, and when I opened up DejaDup, I see the “Could not understand duplicity version” error message again. I get that error message immediately if I click “Back Up Now”, and if I switch to the Restore tab, it’s completely blank.
The weird thing is that I still see a valid version on the command line:
$ flatpak run --command=duplicity org.gnome.DejaDup --version
duplicity 3.0.2 August 09, 2024
I haven’t touched it since I reinstalled it a few days ago; the About Backups dialog says it’s version 47.0, and that matches the version reported by flatpak info org.gnome.DejaDup, so I’m not sure why it’s suddenly failing.
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