impossible to configure the facebook app conection after domain change

Hello,

I migrated my jomsocial website domain.
Before :it was : www.friendy.fr and now it's www.ofrate.co

So I modified my facebook app, but when I want to reconfigure the JFBConnect plugin I CAN'T.
The plugin recommend to me the www.friendy.fr domain and I can't save my changes.

And I have a second problem, (creating my new facebook app), its impossible too to set the url and secure url canevas at :www.ofrate.co
facebook say :
Error
URL du canevas must point to a directory (i.e., end with a '/' or a dynamic page (i.e., have a '?' somewhere).
URL sécurisée du canevas must point to a directory (i.e., end with a '/' or a dynamic page (i.e., have a '?' somewhere).

Please can you help me ?

Hello,

thank you now the plugin is configured as well. But I have another problem...
The plugin says (when login with Facebook) : We were unable to retrieve your Facebook account information. Please try again

But, the app ID is ok and I don't know where is the problem...

Can you help me ?