Did you checked that the cast to Cube is not failing? Is the return node getting called and what does it give you back when you set a breakpoint?

Just to give you a correct answer (you already found out in the comments): you are trying to cast a PlayerController to Cube that inherits from Character or Pawn. They are incompatible, so the cast is always failing. If Cube would be inheriting from PlayerController instead and defining a variable H…