Reboot your machine.
Start After Effects.
Create a brand new project.
Import your error-prone project.
Does that work?
First no that didn't work
Second red giant magic bullet looks had a problem so i fixed it and everything got working again
And third, thanks for trying to help, Szalam. (That suggestion often works, remember it.)
Fourth, how did you figure out Magic Bullet was the culprit?
I tried removing it from the clip and then everything worked
It crashes when you keyframe 2 colors in the same clip .