Can't select solid to make stock model. Version different that older?

Version is 2023 Learning edition.

Im trying to follow the Titans M8 CAM video, but already when making the stock model, it’s not working.
I simply can’t select the solid i’ve made.

I can see i’m not using the same version as the teacher and it’s also not the version I’m used to from work. I’ve been away from the game for a while, som it might just be Bozoing, but still, I have used the program for years. Normally it’s been at work where computer people set it up, but It shoulden’t make a difference in this case, no?