I’m having the same issue. I’ve followed the instructions exactly, and also tried building to my device, but I get this “Exception: Attempting to use networking without setting up your API key or Authentication URL. Set those up through the ARDKAuthRegistrar, or at runtime on ServerConfiguration before using networking!” error.
I’ve setup my API key exactly (no trailing spaces) in the Assets/ARDKExamples/Resources/ArdkAuthConfig object. I also tried restarting Unity, to no avail. I’m on Windows. Any clues as to why I might be getting this error?