I'm running slurm 22.05.11 which is available with OpenHCP 3.x Do you think an upgrade is needed?
I feel that lot of slurm operators tend to not use 3rd party sources of slurm binaries, as you do not have the build environment fully in your hands.
But before making such a complex decision, perhaps look for build logs of slurm you use (somewhere in OpenHPC buildsystem?) and check if it was built with libraries needed to have cgroupsv2 working..
Not having cgroupsv2 dependencies during build-time is only one of all possible causes..
josef