Missing Reagent: Key Framing

I’m getting an error “Missing Reagent: Key Framing” when trying to combine “Key Framing” with “Key Fragments”.

But I have TWO “Key Framing” in my bags.

I tried deleting my CACHE folder, but problem persists, therefore bug ergo reported.

You need three. You always have.

It’s in the tooltip of the Key Framing object.