no one? It seems to be related to polkitd. I suspect polkit doesn’t like the user oneadmin to run VM? This is how the opennebula-kvm-node package configure KVM
[root] # cat /etc/libvirt/qemu.conf
user = "oneadmin"
group = "oneadmin"
dynamic_ownership = 0
May be there is something to do on polkit side ?