Swimbot Error

Traceback (most recent call last):
  File "/home/pi/.local/lib/python3.7/site-packages/discord/ext/commands/core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "/home/pi/Swimbot/whois.py", line 218, in whois
    player_info_list = sorted(player_info_list, key = lambda i: i['townHallLevel'],reverse=True)   #SORTING ALGORITHM
  File "/home/pi/Swimbot/whois.py", line 218, in <lambda>
    player_info_list = sorted(player_info_list, key = lambda i: i['townHallLevel'],reverse=True)   #SORTING ALGORITHM
TypeError: 'NoneType' object is not subscriptable