Error running Bot.py ('NoneType' object is not subscriptable)

[SALBO-Y]

Thank you conor19w

After running a bot.py.
Print a my account balance and then error is print
plz help me the solution...

Combining Historical and web socket data... Finished. Start Balance: xx.xxxx **'NoneType' object is not subscriptable Bot.py 65**

[conor19w]

In make_Decision() in Data_set.py do you return anything?