I got this error too and spent about an hour trying to figure it out before checking the forums.  Jinni's code fixed it. Thanks!  It would be really helpful if that code was back in the release.

I'm attempting to create a room and authenticate users on my server, and then forward them on to a room. I'm able to get an authentication token that looks like "exx=ffdadfasfdsafdfadfsafaetc=", but am not sure where to go from here.  The SDK says the next step is to "provide the client application ...