Adding the "Scriptable Camera" component causes the editor to throw NullReferenceException continuously and component properties are not showing in the inspector, refer the attached video.

Steps to repro:
1. Create a new project
2. Hierarchy > Create Empty GameObject
3. Add "Scriptable Camera" component in the Inspector

Actual Result:
NullReferenceException is thrown on adding the "Scriptable Camera" component.

Expected Result:
"Scriptable Camera" component is added without any errors.

Occurring on: 2020.2.0a2, 2020.2.0a1

Note: Scriptable Camera is introduced in 2020.2.0a1

Environment:
Windows 10 & macOS 10.14

Stack trace:
NullReferenceException: Object reference not set to an instance of an object
UnityEditor.EditorGUI+EnumNamesCache.GetEnumLocalizedGUIContents (UnityEditor.SerializedProperty property) (at <add04920b5a84c6794c0fcbe71769dfc>:0)
UnityEditor.EditorGUI.EnumPopup (UnityEngine.Rect position, UnityEditor.SerializedProperty property, UnityEngine.GUIContent label) (at <add04920b5a84c6794c0fcbe71769dfc>:0)
UnityEditor.EditorGUI.DefaultPropertyField (UnityEngine.Rect position, UnityEditor.SerializedProperty property, UnityEngine.GUIContent label) (at <add04920b5a84c6794c0fcbe71769dfc>:0)
UnityEditor.PropertyHandler.OnGUI (UnityEngine.Rect position, UnityEditor.SerializedProperty property, UnityEngine.GUIContent label, System.Boolean includeChildren, UnityEngine.Rect visibleArea) (at <add04920b5a84c6794c0fcbe71769dfc>:0)
UnityEditor.GenericInspector.OnOptimizedInspectorGUI (UnityEngine.Rect contentRect) (at <add04920b5a84c6794c0fcbe71769dfc>:0)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass58_0.<CreateIMGUIInspectorFromEditor>b__0 () (at <add04920b5a84c6794c0fcbe71769dfc>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)