This error usually indicates that your application setup is incorrect for the "Authorized redirect URIs" setting. Please review our
Google Application Setup Guide
, specifically 7.b.vi.
The URLs should be in the following formats:
http://yourdomain.com/index.php?option=com_jfbconnect&task=authenticate.callback&provider=google
http://www.yourdomain.com/index.php?option=com_jfbconnect&task=authenticate.callback&provider=google
https://yourdomain.com/index.php?option=com_jfbconnect&task=authenticate.callback&provider=google
https://www.yourdomain.com/index.php?option=com_jfbconnect&task=authenticate.callback&provider=google