The uri redirection is false (return error 400) but I don't what I put in field
I test :
http://www.example.com/index.php?option=com_jsn&tmplsocial=1&view=google&task=accesstoken
http://www.talentsdebretagne.eu/index.php?option=com_jsn&tmplsocial=1&view=google&task=accesstoken
http://www.talentsdebretagne.eu/oauth2callback
http://www.example.com/oauth2callback
but now I have no more idea