Swimbot Error

Traceback (most recent call last):
  File "/home/pi/.local/lib/python3.9/site-packages/discord/ext/commands/core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "/home/pi/Swimbot/waitlist.py", line 84, in waitlist
    await self.wait_board(ctx.message.channel)
  File "/home/pi/Swimbot/waitlist.py", line 468, in wait_board
    if not self.player_string(player):
  File "/home/pi/Swimbot/waitlist.py", line 66, in player_string
    date = arrow.get(time_list[index]).format("MM/DD")
IndexError: list index out of range