

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!
I'm guessing you misspelled the name of one of the fields so that it doesn't match the column headers in the import file.
Just got back into edit the object, Fields and Relationships, and correct the name if whichever field is spelled wrong.
Got it, Thank you!