serializedObject.FindProperty("onClick") returns null

Questions & Answers
1

I have the following InspectorGUI code for a custom Button class:

public override void OnInspectorGUI() {
		serializedObject.Update();
		EditorGUILayout.PropertyField(serializedObject.FindProperty("onClick"), true);
		serializedObject.ApplyModifiedProperties();
	}

However FindProperty appears to be returning null:

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.PropertyHandler.OnGUILayout (UnityEditor.SerializedProperty property, UnityEngine.GUIContent label, System.Boolean includeChildren, UnityEngine.GUILayoutOption[] options) (at <3e481e8f36eb4d4c8d94b9ba6b2be438>:0)
UnityEditor.EditorGUILayout.PropertyField (UnityEditor.SerializedProperty property, UnityEngine.GUIContent label, System.Boolean includeChildren, UnityEngine.GUILayoutOption[] options) (at <3e481e8f36eb4d4c8d94b9ba6b2be438>:0)
UnityEditor.EditorGUILayout.PropertyField (UnityEditor.SerializedProperty property, System.Boolean includeChildren, UnityEngine.GUILayoutOption[] options) (at <3e481e8f36eb4d4c8d94b9ba6b2be438>:0)
MainMenuButtonEditor.OnInspectorGUI () (at Assets/Editor/MainMenuButtonEditor.cs:16)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass55_0.<CreateIMGUIInspectorFromEditor>b__0 () (at <3e481e8f36eb4d4c8d94b9ba6b2be438>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
2

Try “m_OnClick” as that’s the [actual name of the field][1]. As you can see in the past it was called onClick.