LXC Cgroups issue - containers won't start

I’m running LXC and I opened a ticket on their forum:

Stephan Graber said I have no option but to modify the kernel settings for CGroups, but I don’t understand why that is necessary if I’m running Manjaro and Ubuntu 22.04, which are both recent OS releases.

How can I check the issue properly to see which cgroup Manjaro is actually running?

Which distro OS can I use for the containers so that I don’t need to modify the kernel?