From the comments in the forum, it seems that the AppImage was corrupted. Since it doesn't seem apparmor related, I'm setting this bug as Invalid. Feel free to change back it if you don't agree.
** Changed in: apparmor (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apparmor in Ubuntu. https://bugs.launchpad.net/bugs/2074068 Title: Squashfs image uses (null) compression, this version supports only xz, zlib. Status in apparmor package in Ubuntu: Invalid Bug description: Hello How resolve a@b:~/Téléchargements$ ./DoctolibProDesktop-latest.AppImage Squashfs image uses (null) compression, this version supports only xz, zlib. Cannot mount AppImage, please check your FUSE setup. You might still be able to extract the contents of this AppImage if you run it with the --appimage-extract option. See https://github.com/AppImage/AppImageKit/wiki/FUSE for more information open dir error: No such file or directory a@b:~/Téléchargements$ ./DoctolibProDesktop-latest.AppImage --appimage-extract Squashfs image uses (null) compression, this version supports only xz, zlib. Failed to open squashfs image a@b:~/Téléchargements$ ./DoctolibProDesktop-latest.AppImage --appimage-extract-and-run Squashfs image uses (null) compression, this version supports only xz, zlib. Failed to open squashfs image Failed to extract AppImage dpkg -l | grep libfuse ii libfuse2:amd64 2.9.9-5ubuntu3 amd64 Filesystem in Userspace (library) ii libfuse3-3:amd64 3.10.5-1build1 amd64 Filesystem in Userspace (library) (3.x version) lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 22.04.4 LTS Release: 22.04 Codename: jammy And https://forum.ubuntu-fr.org/viewtopic.php?pid=22775048#p22775048 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2074068/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp