System.ListException: List index out of bounds: 6

Whenever I am trying to load in developer console to receive my grade/checkpoint score for lab 1a. I am reaching this error message.
Sorry you're stuck but there's almost always a pretty easy fix! Do NOT try to start all over again, uninstall Max's Pitch Package, etc. That can make it worse. There's a 95% chance the same snag/fix is listed & answered in the Help FAQ. But if you can't find it there, post your problem here.
Make sure you post in the right category below & be sure to include a screencap showing the issue!
Hi, I just sent the requested info. Please let me know next steps.
Ok, please email me at tim.hill@themaxlabsproject.com and send me your Username and password so I can log into your account and take a look, ok? When I try to log in, SF will send you a message with a verification code you will need to send me within 15 minutes so I can complete the login process. So we need to sync up for this. If not tonight, then perhaps tomorrow? Email me and let me know, ok?