I believe you are missing some dependencies. These are files that contain the textures needed for those buildings, and since the textures aren't there, the buildings aren't shown.
You will need to find the correct dependencies files and download them with the plug-ins. In the folder that the plug-in is downloaded in, look for a read me file. Look near the bottom and it should give a link to the dependencies it needs. That or look in the details page where you download the plug-in from.
Hope it works