Creating map with Digital Twin

[angian00]

Hi. I am trying to generate a map from OpenStreetMap data using Digital Twin (https://carla.readthedocs.io/en/latest/adv_digital_twin/).
I have managed to create the level, but I can't find the buildings etc. in the Editor View or the World Outliner until I actually run the level (it runs fine).

Maybe this is the expected behaviour because the content is procedurally generated?
Unfortunately I need to have everything at editing time to add my ad-hoc building meshes.

I notice that when Playing the generated map, there is an error ("Invalid pin connection") compiling UW_HoudiniBuildingImporter blueprint, is that related?