Why Scene does not open after scene fading? C#

My Scene does not open, but it goes to black screen (middle of the fading)? I tested this with out fading and it worked and went to the losing scene.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.SceneManagement;
 
 public class loseParticle : MonoBehaviour {
 
     public GameObject explosionPrefab;
 
     void OnTriggerEnter2D(Collider2D obj) {
         GameObject explosionObject = Instantiate(explosionPrefab, this.transform.position, Quaternion.identity) as GameObject;
         Destroy (explosionObject, 5f);
         Destroy (obj.gameObject);
         StartCoroutine(ChangeLevel());
         }
         
         IEnumerator ChangeLevel () {
         float fadeTime = GameObject.Find("_GM").GetComponent<Fading>().BeginFade(1);
         yield return new WaitForSeconds(fadeTime);
         SceneManager.LoadScene(2);
     }
 }