I've updated my part, you can delete the old part and drop the new one (scratch.mit.edu/projects/1122280887/editor) into your MAP right now and it will work! Also, @QueenBea5's part seems to have broken, you can fix that by going into the "7.1" sprite and changing the top "when flag clicked" block to a "when I recieve [Part 7]" block (or you can backpack the updated part from here). I noticed your system with playing sounds at 0 volume, and I must say, that's quite clever! :) I might recommend using the approach I used in this project, and controlling music and broadcasts from the Stage or just one sprite, as it seems to make the audio line up better with the parts.
It was super fun to participate in this MAP! Huge thanks to @GazerOfStars for hosting and allowing me to join! :D This is a bug fix. Creators are credited in original project.