Unreal 4.23 unable to build C++ code

Hi folks i’m new to unreal i’m doing the C++ tutorial from here :

https://docs.unrealengine.com/en-US/Programming/Tutorials/FirstPersonShooter/2/7/index.html

All work fin until the code set the camera in the class, here there is an error, i got the copied FULLY copied from the tutorial

here is the error :

UPROPERTY(VisibleAnywhere)
UCameraComponent* FPSCameraComponent;

thanks,

What is the error?

Add #include "Camera/CameraComponent.h" before the #include "FPSCharacter.generated.h"