Comment 21 for bug 1951491

It has been reported also for Debian 11

https://forum.snapcraft.io/t/non-classic-snaps-fail-to-load-due-to-cgroup-apparmor-issue/28756

looking at `tail -f /var/log/syslog` I see almost the same message

```
May 13 08:31:15 iltoshibo dbus-daemon[15558]: [session uid=1000 pid=15556] Activating service name='org.freedesktop.systemd1' requested by ':1.3243' (uid=1000 pid=797511 comm="telegram-desktop " label="unconfined")
May 13 08:31:15 iltoshibo dbus-daemon[15558]: [session uid=1000 pid=15556] Activated service 'org.freedesktop.systemd1' failed: Process org.freedesktop.systemd1 exited with status 1
```

Maintainer say "my guess is there’s something missing or misconfigured in your session.". Now the problem is to find _what_ is missing or misconfigured (for all subscriber here, I think)