Why the body mesh doesn't show in the scene window?

I'm new with Lens Studio. I'm following the tutorials how to begin or start a project. I'm starting from a scratch, then i try to add new object in scene hierarchy, i select Full Body Mesh. The mesh will appear at the Preview screen, but not at the scene. How can i solve this problem? I'm anxious because i can't go further with any project like this.

Thank you in advance.