Unable to stream - ReactorNotRestartable error

I am unable to stream tick level data and keep getting ReactorNotRestartable error. I am able to pull historical data and have tested pretty much every API call without any problem except streaming tick data. Can you please help. below is my code.

from kiteconnect import KiteConnect
from kiteconnect import KiteTicker
import logging

request_token = open("request_token.txt",'r').read()
key_secret = open("api_key.txt",'r').read().split()
kite = KiteConnect(api_key=key_secret[0])
data = kite.generate_session(request_token, api_secret=key_secret[1])

#create KiteTicker object
kws = KiteTicker(key_secret[0],data["access_token"])

tokens = [738561, 5633]

def on_ticks(ws,ticks):
    # Callback to receive ticks.
    logging.debug("Ticks: {}".format(ticks))
    print(ticks)

def on_connect(ws,response):
    # Callback on successful connect.
    logging.debug("on connect: {}".format(response))
    ws.subscribe(tokens)
    #ws.set_mode(ws.MODE_FULL,tokens)

kws.on_ticks=on_ticks
kws.on_connect=on_connect
kws.connect()

#########################################################################################
Below is the error

Traceback (most recent call last):

  File "<ipython-input-70-afaa4a2e484c>", line 19, in <module>
    kws.connect()

  File "C:\Users\User\Anaconda3\lib\site-packages\kiteconnect-3.8.0-py3.6.egg\kiteconnect\ticker.py", line 534, in connect
    reactor.run(**opts)

  File "C:\Users\User\AppData\Roaming\Python\Python36\site-packages\twisted\internet\base.py", line 1282, in run
    self.startRunning(installSignalHandlers=installSignalHandlers)

  File "C:\Users\User\AppData\Roaming\Python\Python36\site-packages\twisted\internet\base.py", line 1262, in startRunning
    ReactorBase.startRunning(self)

  File "C:\Users\User\AppData\Roaming\Python\Python36\site-packages\twisted\internet\base.py", line 765, in startRunning
    raise error.ReactorNotRestartable()

ReactorNotRestartable