* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.

* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.

코드를 따라서 쳤는데요. 카메라가 고정이 되어서 안 움직입니다.

오류도 안 떠서 어떻게 해결해야 할 지 모르겠어요.

작성한 코드 및 에러 메세지

using UnityEngine;
using System.Collections;
using TMPro;


public class GameManager : MonoBehaviour
{
    public static GameManager Instance;
    public bool IsGameEnd;


    [HideInInspector] public Transform PlayerTransform;
    public Vector3 currentSavePoint;


    [SerializeField] private TextMeshProUGUI timeTxt;
    [SerializeField] private TextMeshProUGUI bestScoreTxt;
    [SerializeField] private GameObject[] CharacterPrefabs;


    private PlayerAnimatorController animatorController;
    private float elaspedTime = 0f;
    private float bestScore = 0f;


    void Start()
    {
        Instance = this;


        animatorController = Instantiate(CharacterPrefabs[PlayerPrefs.GetInt("SelectedCharacter", 0)], currentSavePoint, Quaternion.identity).GetComponent<PlayerAnimatorController>();


        IsGameEnd = false;


        timeTxt.text = $"{elaspedTime:0.00}";
        bestScore = PlayerPrefs.GetFloat("BestScore", 99.99f);
        bestScoreTxt.text = $"BEST : {bestScore:0.00}";
    }


    void Update()
    {
        if (IsGameEnd) return;
        elaspedTime += Time.deltaTime;
        timeTxt.text = $"{elaspedTime:0.00}";
    }


    public void EndGame(bool isWin)
    {
        StartCoroutine(StopGameGradually());
        IsGameEnd = true;
        if (isWin)
        {
            if (elaspedTime < bestScore) PlayerPrefs.SetFloat("BestScore", elaspedTime);
        }
    }


    IEnumerator StopGameGradually()
    {
        float time = 0f;
        while (time < .5f)
        {
            time += Time.deltaTime;
            Time.timeScale = Mathf.Lerp(1f, 0f, time * 2f);
            yield return null;
        }
    }
}

using UnityEngine;


public class PlayerCameraController : MonoBehaviour
{
    [SerializeField] private Vector3 cameraOffset;


    private Camera cam;


    void Start()
    {
        cam = Camera.main;
        //Debug.Log("여기");
    }


    void LateUpdate()
    {
        //Debug.Log("여기2");
        if (GameManager.Instance.PlayerTransform == null) return;
        HandleCamera();
    }


    private void HandleCamera()
    {
        //Debug.Log("여기4");
        Quaternion playerRotation = GameManager.Instance.PlayerTransform.rotation;
        Vector3 rotatedOffset = playerRotation * cameraOffset;
        cam.transform.position = GameManager.Instance.PlayerTransform.position + rotatedOffset;
        cam.transform.LookAt(GameManager.Instance.PlayerTransform);
    }
}