vz-logger opens in broswer but python cannot connect to localhost.

[importrayhan]

File "____.py", line 9, in
vzlogger.connect("http://localhost:4000")
File ".................\lib\site-packages\vzlogger\logger.py", line 52, in connect
return Connection(url)
File ".................\logger.py", line 40, in init
_client.connect(url, namespaces=['/program'])
File ".................\lib\site-packages\socketio\client.py", line 159, in connect
raise exceptions.ConnectionError(exc.args[0]) from None
socketio.exceptions.ConnectionError: OPEN packet not returned by server