OnTriggerEnter is not working! I have tried absolutely everything I can think of.

I am working on a project and the goal of my script is to set the first state of a gameobject inactive and then set the second state active when colliding with a gameobject with the tag "Ball." I have made sure one or both of the trigger objects has a rigidbody and that one of them has isTrigger on and the other off. Everything I can think of does not work.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class JumpPad : MonoBehaviour
 {
     public GameObject State1;
     public GameObject State2;
 
     private void OnTriggerEnter(Collider other)
     {
         if (other.CompareTag("Ball"))
         {
             State1.SetActive(false);
             State2.SetActive(true);
         }
     }
 }