Error establishing connection

I started out with the KiteTicker client today(Python SDK) and copied the code shown in sample in your docs. In order to do fault tolerance checks to ensure our backend ETLs can handle the flow, I closed the PyCharm console (which was running the program) manually and then tried to relaunch. However, now I get this error (we are using Python 3.9.2)
ERROR:kiteconnect.ticker:Connection error: 1006 - connection was closed uncleanly (peer dropped the TCP connection without previous WebSocket closing handshake)

We have a valid token (we use it already with a historical data API) so that is not an issue
The code is below

import logging
from kiteconnect import KiteTicker

token = 'our_token'
api_key = 'the key we got from our app'

# Initialise
kws = KiteTicker(api_key, token)

def on_ticks(ws, ticks):

# Callback to receive ticks.
file = 'E:\Projects\Technotradez\codebase\\assets\tick_data.txt'
with open(file, 'r') as file:
file.write("Ticks: {}\/n".format(ticks))
#logging.debug("Ticks: {}".format(ticks))

def on_connect(ws, response):
# Callback on successful connect.
# Subscribe to a list of instrument_tokens (RELIANCE and ACC here).
ws.subscribe([738561, 5633])

# Set RELIANCE to tick in `full` mode.
ws.set_mode(ws.MODE_FULL, [738561])

def on_close(ws, code, reason):
# On connection close stop the main loop
# Reconnection will not happen after executing `ws.stop()`

def on_error(ws, code, reason):

# Assign the callbacks.
kws.on_ticks = on_ticks
kws.on_connect = on_connect
kws.on_close = on_close
kws.on_error = on_error

# Infinite loop on the main thread. Nothing after this will run.
# You have to use the pre-defined callbacks to manage subscriptions.

Could someone please help here.
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