Why is the unity3d scene not loading?

Question

Game development

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

    public class Menu : MonoBehaviour
    {
        
    		public void OnClickStart() {
    			SceneManager.LoadScene(1);
    		}

    }

I supplement the question: You can not look at the error in the console. The script is exactly the same as I posted it on the site. An error from the tests remained in the console, now I have the code as I wrote. The console does not give any errors when you click on the button and when you start the game

Answer 1

Problem solved, code is working. The error was in the file where the script led. The file somehow got lost and everything that I did in it was not saved.