Notice: Undefined index: so_sociallogin_linkdinapikey in /home/m8a8qm04moe9/public_html/catalog/controller/extension/module/so_sociallogin.php on line 480Notice: Undefined index: so_sociallogin_linkdinsecretapi in /home/m8a8qm04moe9/public_html/catalog/controller/extension/module/so_sociallogin.php on line 482Please go to LinkedIn Apps page , create an application, and in the line 481 set the client_id to Consumer key and client_secret with Consumer secret. The Callback URL must be Make sure you enable the necessary permissions to execute the API calls your application needs.