Comment 32 for bug 2017980

Thanks a lot John !
Waiting for the fix, this solution find in the Mantic release notes https://discourse.ubuntu.com/t/mantic-minotaur-release-notes/35534 works :

Disable this restriction across the entire computer for a single boot via echo 0 | sudo tee /proc/sys/kernel/apparmor_restrict_unprivileged_userns. This setting will be lost on reboot