OnTrigger does not work for multi targets

Hello. I am new to Unity. I am using Easy Ar multi-target tracker, and OnTriggerEnter does not work for me. I considered checking IsTrigger and having a rigid body. It is surprising that for a simple object like cube the OntriggerEnter works but for my multi-target, the OnTriggerEnter never called.

here is 1 of my project:

Pls, help me.

p.s. There may be a problem with the targets object like their shader directory, but I am not sure. When I move the character toward targets by tag, it moves but OnTriggerEnter does not work.

More Descriptions are as follows:

This is one of my targets tracked by an imageTracker.

And this is my character. both have rigid body , collider, and checked isTrigger.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class moveToTarget : MonoBehaviour
    private float step;
    private GameObject[] tag1;
    private GameObject[] tag2;
    private bool hit1;
    private bool hit2;
//    private bool hit3;

    // Start is called before the first frame update
    void Start()
        hit1 = hit2 = false;
        step = 2f * Time.deltaTime;
        tag1 = GameObject.FindGameObjectsWithTag("tag1");
        tag2 = GameObject.FindGameObjectsWithTag("tag2");

    private void OnTriggerStay(Collider other)
        hit1 = true;
    void OnCollisionEnter(Collision collision)
        hit1 = true;

        private void OnTriggerEnter(Collider other)
        if (other.gameObject.tag == "tag1")
            hit1 = true;
        else if (other.gameObject.tag == "tag2")
            hit2 = true;
       // else if (other.gameObject.tag == "tag3")
         //   hit3 = true;

    // Update is called once per frame
    void Update()
         if (!hit2)
            transform.position = Vector3.MoveTowards(transform.position, tag2[0].transform.position, step);

         else if (!hit1)
           transform.position = Vector3.MoveTowards(transform.position, tag1[0].transform.position, step);



This is the script added to my character. The character movetoward target I mentioned, but the OnTriggerEnter never called.

Not sure I understood the problem, but make sure the object entering the trigger has a collider.