pressing the V key is changing the "Occlusion Culling" of the FirstPersonCamera

Dears,
I have a weird issue, when I press V to activate the FPS, it gives me a blue screen.
After some research, I found that, pressing the V key is changing the "Occlusion Culling" of the FirstPersonCamera is changing from "Everything" to "Overlay" only. So during the runtime, I manually changed the Occlusion Culling to Everything, and then the FPS works normally, why does pressing the V change the Occlusion Culling to Overlay only?
 
This is the Demo scene not mine.
Also, I have UIS and Deathmach packages installed in this project.
I am using Unity version 2021.3.19f1
 
As @nathanj mentioned, a blue screen sounds like you are using a different render pipeline. Make sure you import the integration for that pipeline. The demo scene uses the built in render pipeline.
 
I double checked every step in the instructions, and fixed any missing step at my side, and now it works perfectly.
Thanks for your responses.
 
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