Autentication problems with google api and facebook

I'm seeing that Social login has some autentication problem
I created a Google Client ID and Client Secret for Google access and App ID and App Secret for facebook but i'm redirected on this page:
www.titaniagdr.it/index.php/component/sl...der/google/auth.html
But the page is a copy of the page is a void article of my joomla template.....
Last month when i checked i remembered that it showed a google/facebook login page...
Could you help me to understand what the problem is or where the error is?
Thanks
Francesco

Now i set correctly the callback url from slogin.info but it gives me this error:
{"error":1,"msg":"Site not found"}

Hi dear,
I have the same problem on 1 of my 4 sites.
I have upgraded to
Version of the component - 2.5.2
Version of the module - 2.3.1
I have deleted the record and generated another one, exactly the same problem, using Google or Facebook login
{"error":1,"msg":"Site not found"}
www.omanne.fr
Thank's for answer