no active physical camera on the scene?

Hi guys,

I'm beginner with SolidRocks, and I've already got stucked where I try to use the auto exposure.
If I click on it, I got a message: Sorry, I need a Vrayphysicalcamera as active camera.
Although it's the vrayphisicalcamera view I'm in.

Can anybody tell me please what did I wong?

Thank you.

Best,

Kat