Hello! I'm new to hubs and I'm trying to create an educational experience. The scene I want to create can't really be done in Spoke as I need architectural elements with colors, so I built in in Blender, with which I am an absolute beginner. I've managed to use the scene I created in Hubs, but the floor plan and spawn point are missing and people will spawn in a confusing interior of a shape, so I wanted to remix in Spoke. When I try to remix the scene, I get an error: Unexpected token '<' , "<!DOCTYPE" ...is not valid JSON. Is there something I can change in my blender file that will resolve this error or is there a way to add spawn points and floor plans to Blender (I didn't see these elements in the Hubs kit in Blender after installing)