Point system, something wrong

on my finish line I have a cube which can be triggered and I wanted to give points once user reaches to finish and this is what i made but it isnt working

cube script

 public spherescript player;
    
     private void OnTriggerEnter(Collider other)
     {
         GameObject.Find("Sphere").SendMessage("FinishL4");
         PlayerPrefs.SetInt("levelReached", 2);
         Instantiate(patlama, this.gameObject.transform.position, this.gameObject.transform.rotation);
         scorePanel.SetActive(!scorePanel.activeSelf);
         player.score += 50; 
         
     }

and player sphere script

 void Update () {
 
         rigidbodyy = GetComponent<Rigidbody>();
    
    
         
         
         
         rigidbodyy.velocity = new Vector3(joystick.Horizontal * 15f,
                                           rigidbodyy.velocity.y,
                                           joystick.Vertical * 15f);
 
         
         scoreText.text = "Points: " + score.ToString();
         
        
     }