I opened my animation and ALL frames are empty!!!!???

I’ve been working on an animation for weeks, but today I opened it and the program displayed an error saying it couldn’t find the sound file…I click Okay since I think it’s something I can just re-upload…but when I scrub the timeline through all the frames, THEY ARE EMPTY!
Suddenly, some random frames pop up but they claim to be missing certain colours.
The program asks to “resolve” colours, but when I click it, it just recovers 1 colour from a palette that had waaaaaaaaaaay more colors!
Please tell me there is something I can do!

Did you move files? Did you backup your work on a regular basis? (I hope so! Always create backups after each day of work!).