Hello Gideon,
The problem with the Pro edition could be caused by automatic GPS EXIF import. Since the coordinates may be not accurate or actually identical for all the cameras, the model could not be referenced and displayed.
If it is the source of the problem, please open Ground Control pane, select all the camera instances, and press DEL (or choose Clear from the context menu), then switch the coordinate system in the Ground Control settings dialog from WGS84 to Local Coordinates and then click reset view in the Model view.