Having issues with StartCoroutine

Hello, to start off I want to say that I am very new to all of this and was working my way through a tutorial on youtube when I noticed that I was getting an error that the person doing the video didn't get.

Can someone help me with the issue?

Here is what I have:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.SceneManagement;
5.  
6. public class SplashtoMenu : MonoBehaviour
7. {
8.     void Start()
9.     {
10.         StartCoroutine(LoadMenu());
11.     }
12.  
13.     IEnumerable LoadMenu()
14.     {
15.         yield return new WaitForSeconds(4);
16.         SceneManager.LoadScene(1);
17.     }
18. }
19.  

This is the error message that I'm getting:

SplashtoMenu.cs(10,24): error CS1503: Argument 1: cannot convert from 'System.Collections.IEnumerable' to 'string'

I am using Unity 2018.3.8f1 personal and Visual Studio v. 4.7.03056 in case that makes a difference.

 

IEnumerator not IEnumerable

 

The method should return IEnumerator, not IEnumerable.

 

Thank you! I didn't notice that.