Something even more odd now. Models I've downloaded before work with Unity but any new models I downloaded, even if I redownload models that have worked before, I get the same error message. Maybe I could try reinstalling Unity.
For some reason when I try to upload this model and the normal Nia model into Unity it gives me an error. "Failed to import package with error: Couldn't decompress package". I'm using the most recent version of the SDK and other models upload just fine. Any idea what the issue is?