Tracking down all of these headers based on the functions we’re using gets exhausting, so I thought I’d save future students the trouble by sharing the header file format that was able to help me compile.
#include "Grabber.h"
#include "Runtime/Core/Public/Math/Vector.h"
#include "Runtime/Core/Public/Math/Rotator.h"
#include "GameFramework/Actor.h"
#include "GameFramework/Controller.h"
#include "GameFramework/PlayerController.h"
#include "Engine/World.h"