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 Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2074068 Title: Squashfs image uses (null) compression, this version supports only xz, zlib. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2074068/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs