Lesson 4.1 - Move in direction of focal point

I am currently doing the Junior programming course. In Lesson 4.1 the ball doesn't seem to be following the direction of the camera when I rotate it. I have checked that my GameObject has the same spelling etc:

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class PlayerController : MonoBehaviour { public float speed = 5.0f; private Rigidbody playerRb; private GameObject focalPoint;

 // Start is called before the first frame update
 void Start()
 {
     playerRb = GetComponent<Rigidbody>();
     focalPoint = GameObject.Find("Focal Point");
 }

 // Update is called once per frame
 void Update()
 {
     float forwardInput = Input.GetAxis("Vertical");

     playerRb.AddForce(focalPoint.transform.forward * speed * forwardInput);

 }

}