Failed to load a module that has link with third party dll.

Unfortunately I’m not sure about your specific libraries. It’s possible that SketchUpAPI.lib just provides some bare bone logic to load in the meatier SketchUpAPI.dll at a later point. Traditionally speaking, .dll files are larger than .lib files because they include more metadata. However that is a very sizeable difference which makes me think that you may need both of them.