Question Custom Editor Not Displaying

Hello. I am trying to get a custom editor to display so I can change the properties of a scriptable object I have but for some reason it seems the OnInspectorGui() function isn't being called. Planet is a script I have, shapesettings and coloursettings are two scriptable objects I have to control properties of a generated mesh

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEditor;
5.  
6. [CustomEditor(typeof(Planet))]
7. public class PlanetEdtior : Editor
8. {
9.  
10.     Planet planet;
11.  
12.     private void OnEnable()
13.     {
14.         planet = (Planet)target;
15.     }
16.     public override void OnInspectorGUI()
17.     {
18.         base.OnInspectorGUI();
19.  
20.         DrawSettingsEditor(planet.shapeSettings);
21.         DrawSettingsEditor(planet.colourSettings);
22.     }
23.  
24.     void DrawSettingsEditor(Object settings)
25.     {
26.         Editor editor = CreateEditor(settings);
27.         editor.OnInspectorGUI();
28.     }

 

I don't know too much about custom inspectors but I remember making a custom window to easily display information like this without having to code some new editor script every time I got a new inspector I wanted to display.
It might help you too with that so here is the video that explains how to do that:

 

Have you found any solutions?