Swimbot Error

Traceback (most recent call last):
  File "C:\Users\wmiller\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "c:\Users\wmiller\Desktop\Swimbot\premium.py", line 47, in clanpromo
    intersection = list(set(roles).intersection(set(swimbot_utils.role_list)))[0]
IndexError: list index out of range