For the error you are getting, go the the file you uploaded on the itch page editor and enable the cross origin isolation, it should be a radial button. Hopefully that helps for the future
Thank you so much, the game actually runs now!
The MIDI file that I made to parse the notes was not included in the export. so I deleted the currrent file and will have to wait until the game jam is over before uploading the fixed version of the game as uploads are disabled. So there’s no game for the game jam right now, oops.
Thank you for your help though, I woulnd’t have gotten it to run at all without knowing that!