Scene Window does not render anything (but Game Window does)

[BlueBananaProductions]

Clicking randomly in the blank scene window does cause game objects to be selected in the Hierarchy Window, and the Game Window is rendering fine (and the game runs). But the Scene Window is simply blank for several (not all) scenes in the project.

The Scene Window does however render the scene when the “wireframe” rather than “shaded” shading mode is used.

There is a message in the console that reads:
Can't add 'UniversalAdditionalCameraData' to SceneCamera because a 'UniversalAdditionalCameraData' is already added to the game object!

[BlueBananaProductions]

It turns out that if a camera game object in your scene has more than one “Universal Additional Camera Data (Script)” component on it this will happen. Deleting the second component solved the problem.

[alaa2aqeel]

select Everything to show all layers in scene