Can't delete a VM

[555NASE]

I have update fron FreeNas to TrueNas.
After this I want to delete a VM.

When i do that, I get the folowing ERR.

CallErr

[EFAULT] Unable to retrieve VM status. Failed to destroy VM

0Fehler: Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 138, in call_method
result = await self.middleware._call(message['method'], serviceobj, methodobj, params, app=self,
File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1213, in _call
return await methodobj(*prepared_call.args)
File "/usr/local/lib/python3.9/site-packages/middlewared/service.py", line 506, in delete
rv = await self.middleware._call(
File "/usr/local/lib/python3.9/site-packages/middlewared/main.py", line 1213, in _call
return await methodobj(*prepared_call.args)
File "/usr/local/lib/python3.9/site-packages/middlewared/schema.py", line 975, in nf
return await f(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/middlewared/plugins/vm.py", line 1527, in do_delete
raise CallError('Unable to retrieve VM status. Failed to destroy VM')
middlewared.service_exception.CallError: [EFAULT] Unable to retrieve VM status. Failed to destroy VM

What can I do?