SocketIO client error in python

[nonstophits]

There's an error about socketIO client when I start the aiva. The following is the log:

[Mon Jun 11 2018 13:53:34 GMT+0000 (UTC)] INFO Authenticated database successfully
[Mon Jun 11 2018 13:53:36 GMT+0000 (UTC)] INFO Starting aiva process
[Mon Jun 11 2018 13:53:36 GMT+0000 (UTC)] INFO Starting poly-socketio server on port: 6466, expecting 4 IO clients
[Mon Jun 11 2018 13:53:36 GMT+0000 (UTC)] INFO Starting socketIO client for js at 6466
[Mon Jun 11 2018 13:53:36 GMT+0000 (UTC)] INFO Starting socketIO client for python at 6466
[Mon Jun 11 2018 13:53:36 GMT+0000 (UTC)] INFO Deploying bot aivadev with adapter SLACK
[Mon Jun 11 2018 13:53:36 GMT+0000 (UTC)] INFO Starting socketIO client for python at 6466
./bin/hubot: line 8: /Users/Shawn/SourceCode/github/aiva/node_modules/.bin/hubot: No such file or directory
[Mon Jun 11 2018 13:53:36 GMT+0000 (UTC)] INFO js pfMFAodYAxkGm0VwAAAA joined, 3 remains
[Mon Jun 11 2018 13:53:43 GMT+0000 (UTC)] ERROR Traceback (most recent call last):
File "/Users/Shawn/SourceCode/github/aiva/lib/client.py", line 89, in

[Mon Jun 11 2018 13:53:43 GMT+0000 (UTC)] ERROR client = SocketIO('localhost', int(IOPORT))
File "/usr/local/lib/python2.7/site-packages/socketIO_client/init.py", line 353, in init
resource, hurry_interval_in_seconds, **kw)
File "/usr/local/lib/python2.7/site-packages/socketIO_client/init.py", line 54, in init
self._transport
File "/usr/local/lib/python2.7/site-packages/socketIO_client/init.py", line 62, in _transport
self._engineIO_session = self._get_engineIO_session()
File "/usr/local/lib/python2.7/site-packages/socketIO_client/init.py", line 76, in _get_engineIO_session
transport.recv_packet())
StopIteration

So how can I fix it? Any ideas? Thanks.