The Social login using Facebook and Google doesn’t work.

The Social login using Facebook and Google doesn’t work.
Steps:
1. Go to : http://next.dev.curriki.org/xwiki/bin/view/Coll_Group_CurrikiGeometry/KhanQuizzes?skin=respurriki
2. Click Login
3. Select FB or Google
4. Enter valid credentials

Facebook:
{
"error":

{ "message": "Invalid redirect_uri: Given URL is not allowed by the Application configuration.", "type": "OAuthException", "code": 191 }

}

Google:
Application keeps loading for long time.