Score Invalid after closing randomly
I was working on a very important a cappella arrangement for my class when it closed suddenly, without me pushing the button. I had recently saved it to the cloud, or so I thought I had, but when I re-opened MuseScore, it said the score was invalid. So I went to my OneDrive, but no previous versions of the score were saved there. Is there any way I can retrieve this score? I put about 5 or 6 hours into it and really don't have the time to start again.
Thanks!