generic type "provider not defined" error

[mykolq]

i wanna use it with generic sso type, configure it, but have en error Provider not defined. I've fix Array to string conversion in /var/www/html/glpi/plugins/singlesignon/inc/toolbox.class.php on line 17 by $url var in toolbox.class.php to $url .= "/provider/".$id['id'];, but it still doesn't work , provider uri in developer mode of browser seems to be ok.