ERROR:websocket:error from callback <bound method SmartWebSocketV2._on_data of <ticker.smartWebSocketV2.SmartWebSocketV2 object at 0x7f634e9a5ed0>>: 'int' object has no attribute 'encode'

Not able to receive CRUDEOIL option feed on websocket. But able to recive future.
token="mcx_fo|239484". This is feeding future data.
But token="mcx_fo|243364" is not fetching CRUDEOIL22SEP7000CE

@admin Can you give an example for cash market. Thanks
I want to get the data for reliance in cash market

obj.getCandleData( {"exchange": "NSE", "token": "2885", "interval": "ONE_DAY", "fromdate": '2021-09-03 09:00', "todate": '2021-09-22 00:00'} )

Its response is success but with no data

Response:
{"exchange": "NSE", "token": "2885", "interval": "ONE_DAY", "fromdate": '2021-09-03 09:00', "todate": '2021-09-22 00:00'}

So what am i missing?

Hi new to this.
Could somebody shed light on redirect URL which i asked when creating API keys.
What is redirect URL. And how to create one?