Can`t activate the Dolby Atmos Renderer

Hi,
I’m currently trying to test Dolby Atmos with my new Cubase14pro. In all YouTube videos you can see the “bed window” after the setup assistant has run through. Unfortunately not for me.


In my channel settings for the 7.1.4 renderer I can see the plugin, but I can’t turn it on. Why?
Thank you for helping me !

For the problem above, I used an existing project with stereo output as source material. I first had to adapt the project to 48 kHz. During the conversion process, I had to answer 2 questions that I didn’t really understand ( just for information). Now I’ve started the whole thing from an empty project, where I’ve included an mp3 as “material”. There’s is no problem … hmmm. It must have something to do with the source project. I’m continuing to research…