Fusion Clip that won't render.

Trying to do a screen insert. Two clips from the timeline, made into a Fusion clip. Composite done.
Won't render in timeline. Bar stays red, and attempts to render a bit and then it goes back red. Have also tried forcing the cache. Still no luck.
Won't render in timeline. Bar stays red, and attempts to render a bit and then it goes back red. Have also tried forcing the cache. Still no luck.