BUG: Mk_docker and Proxmox agent broken on cgroupv2 environments (container level): "Parsing of section docker_container_mem failed"

This is probably related to debian switching to cgroupv2 with version 11.
There will be a fix for version 2.1: Werk #12310
A workaround could be to downgrade to cgroupv1 on the host running docker.

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