Swimbot Error

Traceback (most recent call last):
  File "C:\Users\swimm\AppData\Local\Programs\Python\Python37\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "c:\Users\swimm\OneDrive\Desktop\Swimbot\premium.py", line 48, in clanpromo
    intersection = list(set(roles).intersection(set(role_list)))[0]
NameError: name 'role_list' is not defined