Sorry you're stuck but there's almost always a pretty easy fix! Do NOT try to start all over again, eg. uninstall Max's Pitch Package, etc. That can make things worse.
Before you post make sure you check the Help FAQ for an instant solution first. Then, if you can't find it there, you can post your problem here and we'll get to it ASAP (within 24 hours), but be sure you:
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INCLUDE AT LEAST ONE SCREENCAP IN YOUR POST TO SHOW THE PROBLEM!!!!!!!!
explain the problem clearly
Hi,
I followed steps 103-115 to show the essential details when I view the pitch on my phone. However, nothing changed. I am just worried about whether other lab assignments might be built on Lab 1, and I may face any errors in the future. For now, the grader app gives me the complete score without any errors to fix. I am not sure if it is OK to repeat the steps again or whether/how I can delete the changes to repeat the steps.
Don't worry. That is not something that will affect any of the later labs so it's ok.
It does happen sometimes, but it's usually solved by clearing cache, closing & reopening your browser, etc. But again, if you can't get it to show, don't worry about it, ok?