I've seen this problem now a few times which is strange since I havent encoutered it before. I'm using TrueNAS 12.0 U2. I get a message from truecommand that my freenas suddenly went offline. I can confirm the GUI is no longer reachable, however I can easily ssh into the machine and all the associated VMs and jails continue to run. Is there a way to restart the middleware GUI from the command line?