Flatpak: system operation GetRevokefsFd not allowed for user
Warnings:Failed to get revokefs-fuse socket from system-helper: Flatpak system operation GetRevokefsFd not allowed for user
What does that mean?? this only happen with Clapper.
I do not have such warnings on any system where I have Clapper installed. Quick google search indicates at possibility of being installed/run by wrong user, see: https://askubuntu.com/questions/1345054/flatpak-does-not-update-its-apps-when-run-via-cron
I remember that you were experimenting with nightly flatpak packages, please check if removing all your Clapper installed flatpaks and reinstalling from Store fixes this issue. Other then that, maybe running gdb with G_DEBUG=fatal-warnings will show where it happens. But it seems like some system user permissions problem.