Notice: Undefined index: so_sociallogin_linkdinapikey in /home/cpnlnmm83794/public_html/catalog/controller/extension/module/so_sociallogin.php on line 473Notice: Undefined index: so_sociallogin_linkdinsecretapi in /home/cpnlnmm83794/public_html/catalog/controller/extension/module/so_sociallogin.php on line 475Please go to LinkedIn Apps page , create an application, and in the line 474 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.