That error is typically because you missed a header, have a look at which classes you added and check that you have their header included in the .cpp or .h
Eg:
#include "Components/SceneComponent.h"
That error is typically because you missed a header, have a look at which classes you added and check that you have their header included in the .cpp or .h
Eg:
#include "Components/SceneComponent.h"