why this error keeps repeating

Imran

hii there
why this error keeps coming ...

Unhandled Error
Traceback (most recent call last):
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\kiteconnect-3.7.4-py3.6.egg\kiteconnect\ticker.py", line 532, i
n connect

File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\internet\base.py", line 1243, in run
self.mainLoop()
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\internet\base.py", line 1255, in mainLoop
self.doIteration(t)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\internet\selectreactor.py", line 143, in doSelect
_logrun(selectable, _drdw, selectable, method)
--- <exception caught here> ---
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\python\log.py", line 103, in callWithLogger
return callWithContext({"system": lp}, func, *args, **kw)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\python\log.py", line 86, in callWithContext
return context.call({ILogContext: newCtx}, func, *args, **kw)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\python\context.py", line 122, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\python\context.py", line 85, in callWithContext
return func(*args,**kw)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\internet\selectreactor.py", line 154, in _doReadOrWrite

self._disconnectSelectable(selectable, why, method=="doRead")
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\internet\posixbase.py", line 258, in _disconnectSelecta
ble
selectable.connectionLost(failure.Failure(why))
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\internet\tcp.py", line 475, in connectionLost
self._commonConnection.connectionLost(self, reason)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\internet\tcp.py", line 289, in connectionLost
protocol.connectionLost(reason)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\protocols\tls.py", line 398, in connectionLost
self._flushReceiveBIO()
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\protocols\tls.py", line 295, in _flushReceiveBIO
ProtocolWrapper.dataReceived(self, bytes)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\twisted\protocols\policies.py", line 120, in dataReceived
self.wrappedProtocol.dataReceived(data)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\autobahn\twisted\websocket.py", line 131, in dataReceived
self._dataReceived(data)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\autobahn\websocket\protocol.py", line 1175, in _dataReceived
self.consumeData()
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\autobahn\websocket\protocol.py", line 1187, in consumeData
while self.processData() and self.state != WebSocketProtocol.STATE_CLOSED:
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\autobahn\websocket\protocol.py", line 1545, in processData
fr = self.onFrameData(payload)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\autobahn\websocket\protocol.py", line 1640, in onFrameData
self._onMessageFrameData(payload)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\autobahn\twisted\websocket.py", line 150, in _onMessageFrameDat
a
self.onMessageFrameData(payload)
File "C:\Users\arvind kumar\AppData\Local\Programs\Python\Python36\lib\site-packages\autobahn\websocket\protocol.py", line 601, in onMessageFrameDat
a
self.frame_data.append(payload)
builtins.AttributeError: 'NoneType' object has no attribute 'append'