Scale regression: Failed to set NT password for user

This error was not there yesterday, it happen when saving the a user.

Here is the error image:

There is the traceback text.

Error: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 137, in call_method
    result = await self.middleware._call(message['method'], serviceobj, methodobj, params, app=self,
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1215, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/lib/python3/dist-packages/middlewared/service.py", line 469, in create
    rv = await self.middleware._call(
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1215, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/lib/python3/dist-packages/middlewared/schema.py", line 1022, in nf
    return await f(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/middlewared/plugins/account.py", line 317, in do_create
    await self.__set_smbpasswd(data['username'])
  File "/usr/lib/python3/dist-packages/middlewared/plugins/account.py", line 864, in __set_smbpasswd
    await self.middleware.call('smb.update_passdb_user', username)
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1258, in call
    return await self._call(
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1215, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/lib/python3/dist-packages/middlewared/plugins/smb_/passdb.py", line 112, in update_passdb_user
    raise CallError(f'Failed to set NT password for {username}: {setntpass.stderr.decode()}')
middlewared.service_exception.CallError: [EFAULT] Failed to set NT password for ericbsd: Can't load /etc/smb4.conf - run testparm to debug it