How do I fix a blank screen composition?

So I was editing my usual clips, when all the sudden my after effects completely froze and my composition got completely pixelated. Nothing was working so I forced quit and tried going back in After Effects. When I uploaded the saved file however, the screen was dark but all my clips, graphs, keyframes, etc. was all there.

Iv'e checked and looked up everything and I can't seem to find the solution to this. if you have any questions let me know.

Here are some screenshots: