[ovirt-users] Couldn't connect to VDSM within 60 seconds

Hi, we have 3 hosts and a self-hosted engine VM (ovirt version 4.4.). After rebooting all the hosts, we are unable to start the VM hosted-engine. In particular, the output of 'hosted-engine --vm-start' is as follows: "The hosted engine configuration has not been retrieved from shared storage yet, for more details please check sanlock status." We checked the sanlock, ovirt-ha-agent and broker status but all are "active (running)". Checking the log files, all share the common error "RuntimeError: Couldn't connect to VDSM within 60 second", returned in loop. In the vdsm.log we found this error: " 2022-04-05 16:20:11,786+0200 INFO (periodic/0) [vdsm.api] START repoStats(domains=()) from=internal, task_id=8541000f-e7fd-4b59-8ae6-522c87538688 (api:48) 2022-04-05 16:20:11,786+0200 INFO (periodic/0) [vdsm.api] FINISH repoStats return={} from=internal, task_id=8541000f-e7fd-4b59-8ae6-522c87538688 (api:54) 2022-04-05 16:20:11,789+0200 WARN (periodic/0) [root] Failed to retrieve Hosted Engine HA info, is Hosted Engine setup finished? (api:168) " We tried googling to resolve this issue but, unfortunately, unsuccessfully. Can someone help us to solve our critical issue? Bests, Pasquale