Hi INTARIO,
If the Pro Render is chosen, Camera Mapping isn’t working either. You would have the need to convert the Camera Mapping into UV data.
Anything that is grayed out while in Pro Render means that it is not directly possible to use. (Directly as in Camera Mapping needs to be converted.)
Pro Render is in a early state, as mentioned often. The Manual has even a long “Limitations List”.
My best wishes