On Clicking "Settings for Scene view camera" in Scene Window Editor thrown ArgumentException. refer to the attached video.

Steps to repro:
1. Create a new Project.
2. Scene> "Settings for Scene view camera" > Click

Actual Result:
ArgumentException is thrown in the console.

Expected Result:
No error in the console.

Reproducible in:
2021.1.0a2

Working Fine in:
2021.1.0a1

Environment: Ubuntu 18.04 LTS

Stack trace:
ArgumentException: Getting control 0's position in a group with only 0 controls when doing repaint
Aborting
UnityEngine.GUILayoutGroup.GetNext () (at /home/bokken/buildslave/unity/build/Modules/IMGUI/LayoutGroup.cs:129)
UnityEngine.GUILayoutUtility.BeginLayoutGroup (UnityEngine.GUIStyle style, UnityEngine.GUILayoutOption[] options, System.Type layoutType) (at /home/bokken/buildslave/unity/build/Modules/IMGUI/GUILayoutUtility.cs:309)
UnityEngine.GUILayout.BeginScrollView (UnityEngine.Vector2 scrollPosition, System.Boolean alwaysShowHorizontal, System.Boolean alwaysShowVertical, UnityEngine.GUIStyle horizontalScrollbar, UnityEngine.GUIStyle verticalScrollbar, UnityEngine.GUIStyle background, UnityEngine.GUILayoutOption[] options) (at /home/bokken/buildslave/unity/build/Modules/IMGUI/GUILayout.cs:360)