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/.local/lib/python3.7/site-packages/discord/ext/commands/help.py", line 836, in command_callback
    return await self.send_bot_help(mapping)
  File "/home/pi/.local/lib/python3.7/site-packages/discord/ext/commands/help.py", line 1026, in send_bot_help
    filtered = await self.filter_commands(bot.commands, sort=True, key=get_category)
  File "/home/pi/.local/lib/python3.7/site-packages/discord/ext/commands/help.py", line 577, in filter_commands
    valid = await predicate(cmd)
  File "/home/pi/.local/lib/python3.7/site-packages/discord/ext/commands/help.py", line 571, in predicate
    return await cmd.can_run(self.context)
  File "/home/pi/.local/lib/python3.7/site-packages/discord/ext/commands/core.py", line 1076, in can_run
    return await discord.utils.async_all(predicate(ctx) for predicate in predicates)
  File "/home/pi/.local/lib/python3.7/site-packages/discord/utils.py", line 338, in async_all
    for elem in gen:
  File "/home/pi/.local/lib/python3.7/site-packages/discord/ext/commands/core.py", line 1076, in <genexpr>
    return await discord.utils.async_all(predicate(ctx) for predicate in predicates)
  File "/home/pi/Swimbot/premium.py", line 33, in premium_check
    roles = member.roles
AttributeError: 'NoneType' object has no attribute 'roles'