I saw others have had this same CGROUP2 problem previously…
example: Containers Fail To Start Ubuntu 21.10 - #9 by RossMadness
Stephane’s proposed workaround is:
Not too sure what’s going on in your case, we usually don’t see quite that much breakage because of cgroup2.In any case, booting your host system with
systemd.unified_cgroup_hierarchy=false
passed to the kernel should take care of this.
Brian