Space build save games problem

Hi everyone

I’ve got a problem with gmod space build expansion - whenever I load a save game, I can’t spawn any generators, storage devices etc. I end up having the tool out, but there isn’t a ghost image of the prop itself. When I click, nothing happens. Also some of the props I placed do not spawn, so I end up with half a ship where I originally had a whole one.

Is there any way to fix this?

Thanks guys