Yesterday I executed an upgrade on my hypervisor to version 4.1.1.1

After the upgrade, it is impossible to start a virtual machine on it.

The messages I found: Failed to connect socket to '/var/run/libvirt/virtlogd-sock': Connection refused

[root@vm-1 log]# hosted-engine --vm-status | grep -i engine

Engine status : {"reason": "bad vm status", "health": "bad", "vm": "down", "detail": "down"}

state=EngineUnexpectedlyDown

The redhead version: CentOS Linux release 7.3.1611 (Core)

Is this a known problem?

Regards, Eric