MastodonNetworkError: Server ceased communication when mastodon.stream_user(rl)

[melocery]

Hi! I use the template, 'reply.py', as a part of my auto-reply bot.
Everything goes well, but when I use the code as follow:

  class ReplyListener(StreamListener):
      def on_notification(self, notification): #listen for notifications
          if notification['type'] == 'mention': #if we're mentioned:
              process_mention(mastodon, notification)
  
  # create a new instance of our ReplyListener class
  rl = ReplyListener()
  mastodon.stream_user(rl) #go!

I got the error:

Traceback (most recent call last):
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\response.py", line 700, in _update_chunk_length
    self.chunk_left = int(line, 16)
ValueError: invalid literal for int() with base 16: b''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\response.py", line 441, in _error_catcher
    yield
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\response.py", line 767, in read_chunked
    self._update_chunk_length()
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\response.py", line 704, in _update_chunk_length
    raise InvalidChunkLength(self, line)
urllib3.exceptions.InvalidChunkLength: InvalidChunkLength(got length b'', 0 bytes read)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\requests\models.py", line 760, in generate
    for chunk in self.raw.stream(chunk_size, decode_content=True):
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\response.py", line 575, in stream
    for line in self.read_chunked(amt, decode_content=decode_content):
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\response.py", line 796, in read_chunked
    self._original_response.close()
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\contextlib.py", line 99, in __exit__
    self.gen.throw(type, value, traceback)
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\response.py", line 458, in _error_catcher
    raise ProtocolError("Connection broken: %r" % e, e)
urllib3.exceptions.ProtocolError: ("Connection broken: InvalidChunkLength(got length b'', 0 bytes read)", InvalidChunkLength(got length b'', 0 bytes read))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\mastodon\streaming.py", line 64, in handle_stream
    for chunk in response.iter_content(chunk_size = 1):
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\requests\models.py", line 763, in generate
    raise ChunkedEncodingError(e)
requests.exceptions.ChunkedEncodingError: ("Connection broken: InvalidChunkLength(got length b'', 0 bytes read)", InvalidChunkLength(got length b'', 0 bytes read))

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\decorator.py", line 232, in fun
    return caller(func, *(extras + args), **kw)
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\mastodon\Mastodon.py", line 102, in wrapper
    return function(self, *args, **kwargs)
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\mastodon\Mastodon.py", line 3110, in stream_user
    return self.__stream('/api/v1/streaming/user', listener, run_async=run_async, timeout=timeout, reconnect_async=reconnect_async, reconnect_async_wait_sec=reconnect_async_wait_sec)
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\mastodon\Mastodon.py", line 3628, in __stream
    listener.handle_stream(r)
  File "C:\Users\geron\AppData\Local\Programs\Python\Python36\lib\site-packages\mastodon\streaming.py", line 91, in handle_stream
    err
  File "<string>", line 3, in raise_from
mastodon.Mastodon.MastodonNetworkError: Server ceased communication.

Is it because that the instance configeration of my bot or anything else?