In case anyone cares, in this tutorial section, the code to grown and shrink the player doesn’t work in 4.18.3 because the binding function that is overridden is different than the version used in the tutorial.
Tutorial:
virtual void SetupPlayerInputComponent(class UInputComponent* InputComponent) override;
Version 4.18.3:
virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;