You must have this variable declared in your Character (MyCharacter in this case) blueprint and set it to public (eye icon) in order to access it from another blueprint. So possible: 1. You didn’t created health/energy variables in your character blueprint, OR 2. You didn’t set it to public (or both )
I assume you have something like this: Get Player Character —> Cast to FirstPersonCharacter and when dragging wire off from “As First Person Character C” your health variable doesn’t show up in panel? First you could try checking/unchecking “Contex Sensitive” checkbox.