Custom Inspector GUILayout Elements Greyed Out and Uninteractable?

I am creating a custom inspector for SceneAssets but every single GUILayout element I create is greyed out and unable to be interacted with. For example, I can do:

"GUILayout.Button("Hello")"

And the button will appear in the inspector but will be greyed out and not clickable. Here is a basic script that is having this problem:

 using System.Collections;
 using System.Collections.Generic;
 #if UNITY_EDITOR
 using UnityEditor;
 #endif
 using UnityEngine;
 
 #if UNITY_EDITOR
 [CustomEditor(typeof(SceneAsset))]
 public class SceneLockingEditor : Editor
 {
     SceneAsset scene;
     public Texture lockedTex;
     public Texture unlockedTex;
     bool locked;
 
     private void OnEnable()
     {
         scene = (SceneAsset)target;
     }
 
     public override void OnInspectorGUI()
     {
         DrawDefaultInspector();
 
         if (scene)
         {
             GUILayout.Label(scene.name);
 
             if (locked)
             {
                 if(GUILayout.Button(lockedTex, GUILayout.Width(200), GUILayout.Height(200)))
                 {
                     locked = false;
                     Debug.Log("unlocked");
                 }
             }
             else
             {
                 if (GUILayout.Button(unlockedTex, GUILayout.Width(200), GUILayout.Height(200)))
                 {
                     locked = true;
                     Debug.Log("locked");
                 }
             }
         }
 
     }
 }
 #endif

I haven't found anyone else with this problem. I've made plenty of custom inspectors before without this issue. How can I make my buttons interactable?