**Apologies for resurrecting a stale thread but if someone else has this issue I'm hoping this may help** I had the exact same issue last week. New Unraid user with lifetime (It's just that good) An issue with an M2 SSD stopped any of my VMs from running, the VM tab would hang and I'd have to SSH in just to do anything. There were no alerts or apparent errors until I dug into the logs. It's a very long shot but try removing the drive in the M2 slot, mine was causing an issue and it also caused very long wait times (10+mins) when I shut the array down or rebooted the server.