yeah ive seen this problem multiple times this game wasn't meant for Chromebooks but I've gotten it running on guest mode but guest modes only on a normal chromebook
This happened to my school and personal chromebook which is like 3x the power of my school chromebook and im asumming it has something to do with saving the data. if you have a chromebook that can use the guest feature i recomend triyng that
So I actually tried this game on a school chromebook and oddly enough, it only works and loads completely on like the 1st 2nd or 3rd time youve ever loaded the game and played it.