https://issuetracker.unity3d.com/issues/change-layout-to-2-by-3-and-you-get-fallbackeditorwindow-error
Unity Issue Tracker - change layout to 2 by 3 and you get FallbackEditorWindow error
1. Open a new Unity project2. in 'Layout' select option '2 by 3' and you get Failed to destroy editor windows: #3FallbackEditorWindo...