Hello.

One of my users have a facebook login error. i have no idea what is wrong, because i can login with facebook, and also other user.
He told me, he try to login and get this error message:
It says: URL blocking: This redirection failed because the redirection URI has not been added to the whitelist in the Client OAuth settings of the app. Ensure that Client and Web OAuth logging on and add all your app domains as valid OAuth Redirect URIs.

But i think i have added all urls...

HI, Anita.

Thank you for contacting us.
Make sure you add also your site URL without www as I can see that your site use them both.
The best way will be to choose one version and add htacces 301 redirection so each request will be redirected to e.g: vivatalenta.com from www.vivatalenta.com .

Thanks Michal! ;)

I don't know exactly what the solution has brought. The user can login now. I have added your proposal without www. and after search in internet I added two other url's.

For jomsocial user who have the same trouble, try and add also in your Facebook app settings:

http://YOURSITE/_oauth/facebook?close
and
http://YOURSITE/_oauth/facebook