Notice: Undefined index: so_sociallogin_linkdinapikey in /home/ on line 474Notice: Undefined index: so_sociallogin_linkdinsecretapi in /home/ on line 476Please go to LinkedIn Apps page , create an application, and in the line 475 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.