While completing Max Lab 2a I noticed that I missed a step previously and tried to go back and fix it but was not able to. I also tried to move on to 2b and realized that my mistakes affected it too.
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!