Changing Scene Crashes Unity while in play mode

I created 3 scenes and added them to build settings. To change the scene you have to hit the button. My first scene is the main menu, My second scene is the gameplay titled "FreeMode", And the 3rd scene is a copy of "FreeMode" titled "SpeedRun". I tried using the regular SceneManager.LoadScene(int) but it crashed immediately. So I changed my script to

 using UnityEngine;
 using UnityEngine.SceneManagement;
 public class Menu : MonoBehaviour {
 
     public int Freemode;
     public int SpeedRun;
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void Update () {
         
     }
     public void OnTriggerEnter(Collider other)
     {
         if(other.tag == "FreeMode")
         {
           
             StartCoroutine(Load1());
         }
         if (other.tag == "SpeedRun")
         {
           
             StartCoroutine(Load2());
         }
         if (other.tag == "Quit")
         {
             Application.Quit();
         }
     }
 
     IEnumerator Load1()
     {
         AsyncOperation operation = SceneManager.LoadSceneAsync(Freemode);
 
         while (!operation.isDone)
         {
             Debug.Log(operation.progress);
             yield return null;
         }
     }
     IEnumerator Load2()
     {
         AsyncOperation operation = SceneManager.LoadSceneAsync(SpeedRun);
 
         while (!operation.isDone)
         {
             Debug.Log(operation.progress);
             yield return null;
         }
     }
 }
 

After I did this in the console, the progress reaches 0.9% before crashing. Is there any way to fix this?