BRIEF:

Cannot boot VM after updating TrueNAS 12.0-RELEASE to TrueNAS 12.0-U2.

STEPS AND RESULTS:

TrueNAS 12.0-RELEASE with RancherOS VM (with RAW AHCI disk installed originally with FreeNAS 11.3)
Update to TrueNAS 12.0-UC2.

ACTUAL RESULT:

VM is not auto-booted
Cannot manually start VM using UI: libvirtError
Can manually create new VM with same disk, but results in the same error: libvirtError
Can not remove copy of VM in UI: libvirtError

SCREENSHOT / FAULT DETAILS:

libvirtError

internal error: client socket is closed

ADDITIONAL INFO:

Error: Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 137, in call_method
result = await self.middleware._call(message['method'], serviceobj, methodobj, params, app=self,
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1206, in _call
return await self.run_in_executor(prepared_call.executor, methodobj, *prepared_call.args)
File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1110, in run_in_executor
return await loop.run_in_executor(pool, functools.partial(method, *args, **kwargs))
File "/usr/local/lib/python3.8/concurrent/futures/thread.py", line 57, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/local/lib/python3.8/site-packages/middlewared/schema.py", line 977, in nf
return f(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/vm.py", line 1595, in start
self.vms[vm['name']].start(vm_data=vm)
File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/vm.py", line 166, in start
if self.domain.isActive():
File "/usr/local/lib/python3.8/site-packages/libvirt.py", line 1566, in isActive
if ret == -1: raise libvirtError ('virDomainIsActive() failed', dom=self)
libvirt.libvirtError: internal error: client socket is closed