Unity GetComponent

I am having a weird issue with unity

When I reopen the scene the code finds my player object but not the script component I fix this by removing the Player Object and just dragging a new player object to the scene. But if I close the scene and reopen the scene again I have to redo the process again.

The code below is not attach to the player object, it is attached to multiple object as this is how I locate the player on the scene for instantiated objects

 void Start() {
             //DontDestroyOnLoad(transform.gameObject);
             player = GameObject.FindGameObjectWithTag("Player");
             if (player == null)
             {
                 Debug.Log("PLAYER NOT FOUND");
             }
             else {
                 Debug.Log("PLAYER FOUND");
             }
     
             ps = player.gameObject.GetComponent<PlayerStat>();
             if (ps == null)
             {
                 Debug.Log("PS NOT FOUND");
             }
     
         }