Check if you are actually passing the Geometry to the FamilyInstance Node. Since it’s working it gets all the needed minimal input. First thing to check would be if you are actually succeeding in extracting the Solids from the surfaces of the Sketchup model. Turn of all the previews of all the nodes before the Geometry.Translate Node. The preview you are seeing is the Dynamo representation of your skp surfaces, that does not have to mean it is a Solid.
If you start troubleshooting this kind of stuf here, please take a look at this: How to get help on the Dynamo forums