On clicking "Open search preferences..." in Search window editor thrown EndLayoutGroup Error, refer to the attached video.

Steps to Repro:
1. Create a new project
2. Click on search Icon besides collab icon
3. Search window > Open search preferences > Click

Actual Result:
EndLayoutGroup error is thrown in Console on clicking "Open search preferences" in Search window

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:
EndLayoutGroup: BeginLayoutGroup must be called first.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /home/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)