Camera doesn't follow the player

Hi, I have an issue with my Main camera in my project : First of all, my main camera doesn't find the tag on my gameobject even with the "FindGameObjectWithTag" And my main camera act very weird, like i change the position on my main camera on the unity scene, and once play the game, the camera came back at the initial position I really don't understand with it did that. Here the code :

 public class CameraController : MonoBehaviour
 {
     private Transform target;
     [SerializeField] private float smoothSpeed;
     [SerializeField] private float minX, maxX, minY, maxY;
 
     private void Awake()
     {
         target = GameObject.FindGameObjectWithTag("Player").GetComponent<Transform>();
     }
 
     private void LateUpdate()
     {
         // Smoothly move Camera
         // Lerp : first parameter => current position
         // second parameter, => Target Position
         // third parameter => speed
         transform.position = Vector3.Lerp(transform.position, new Vector3(target.position.x, target.position.y, 
             transform.position.z), smoothSpeed * Time.deltaTime);
 
         transform.position = new Vector3(Mathf.Clamp(transform.position.x, minX, maxX),
                                          Mathf.Clamp(transform.position.y, minY, maxY),
                                          transform.position.z);
     }
 }