Why click event doesn't work?

Hi Guys, I am trying to understand how delegates/events work. I have a simple scene with a box w$$anonymous$$ch green by default and should change a colour to red when I click a checkbox in Unity inspector (and then back to green if it is unchecked). Don't understand why it is not working?

T$$anonymous$$s is my Events Script

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 
 public class GameEvents : MonoBehaviour
 {
 
     public static GameEvents current;
 
     void Awake()
     {
         current = t$$anonymous$$s;
     }
 
     public event Action<bool> OnCheckboxClicked;
 
     public void CheckboxClicked(bool click)
     {
         if (OnCheckboxClicked != null)
         {
             OnCheckboxClicked(click);
         }
     }
 
 }

T$$anonymous$$s is Box Controller

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 
 public class BoxController : MonoBehaviour
 {
 
     void Start()
     {
         GetComponent<Renderer>().material.SetColor("_Color", Color.green);
         GameEvents.current.OnCheckboxClicked += ChangeColor;
 
     }
 
     private void ChangeColor(bool click)
     {
         GetComponent<Renderer>().material.SetColor("_Color", Color.red);
     }
 
 
 }
 

And Game Controller

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class GameController : MonoBehaviour
 {
     public bool klick;
 
   private void OnBoolenOn(bool click)
     {
         GameEvents.current.CheckboxClicked(click);
     }
 }