Crashing upon opening WIP score

Hello!

So recently I began writing a score for my school using Musescore for notation. It used to work just fine before. I could open it and edit it like any other score.

Now whenever I try to do that, the entire application crashed, keeping me from writing my score. This is important to me and my school and I CANNOT have it in late, so: if anyone knows how to fix this PLEASE tell me. Below is a link to a video, where I recorded what happened. Plz help me fix this. Thank you!
https://photos.app.goo.gl/3j3e5t2JJvNk4LBe7