Traceback (most recent call last):


 "C:\Users\adnan\AppData\Local\Programs\Python\Python38-32\lib\site-packages\tornado\ioloop.py", line 907, in _run

return self.callback()


 "C:\Users\adnan\AppData\Local\Programs\Python\Python38-32\lib\site-packages\distributed\nanny.py", line 414, in memory_monitor

process = self.process.process
AttributeError: 'NoneType' object has no attribute 'process'

Traceback (most recent call last):

 "/home/ubuntu/inbox/inbox/util/concurrency.py", line 73, in wrapped
return func(*args, **kwargs)

 "/home/ubuntu/inbox/inbox/mailsync/gc.py", line 53, in _run_impl
self.check(current_time)

 "/home/ubuntu/inbox/inbox/mailsync/gc.py", line 72, in check
thread.messages.remove(message)
AttributeError: 'NoneType' object has no attribute 'messages'```