Login error

The reason that error can happen are:
* Your Site URL or App Domain aren't correct. Please run Autotune again and hit "Refresh" in the top right. Make sure all the recommendations are setup correct.
* Your App is in Sandbox mode. This needs to be checked in the developers.facebook.com/apps area for your app.
* Some other configuration error with your app (Whitelist or blacklist is setup, etc).

Please check that the settings are correct in your App for the domain you're using it on, and hopefully that will help narrow things down.

Thanks,
Alex