Something wrong with saving and opening my projects, I don't really know if it's a bug since i'm new

So I open aseprite, make a project, and save it. When I open it EVERYTHING and I mean by EVERYTHING I did just became literally every color of RGB, I tried everything. Reinstall? I tried that. Update? Tried that too. And I tried 10 more things which I’m too tired to list them out

I’m on MacOS Sequoia 15.0, I installed it and made it think I’m in 10.9 and it worked.
I was making other projects, this problem wasn’t happening.
But now it suddenly happened, I didn’t click any key that I didn’t know what they do.