Fatal error: Uncaught Facebook\Exceptions\FacebookSDKException: Required "app_id" key not supplied in config and could not find fallback environment variable "FACEBOOK_APP_ID" in C:\inetpub\vhosts\websiter.me\httpdocs\core\library\facebook\Facebook.php:139 Stack trace: #0 C:\inetpub\vhosts\websiter.me\httpdocs\core\controllers\facebook.php(38): Facebook\Facebook->__construct() #1 C:\inetpub\vhosts\websiter.me\httpdocs\core\app.php(154): require('C:\\inetpub\\vhos...') #2 C:\inetpub\vhosts\websiter.me\httpdocs\index.php(25): require('C:\\inetpub\\vhos...') #3 {main} thrown in C:\inetpub\vhosts\websiter.me\httpdocs\core\library\facebook\Facebook.php on line 139