Fatal error: Uncaught Facebook\Exceptions\FacebookSDKException: Required "app_secret" key not supplied in config and could not find fallback environment variable "FACEBOOK_APP_SECRET" in /home/redemulticomnews/www/facebook/facebook-php-sdk/Facebook.php:142 Stack trace: #0 /home/redemulticomnews/www/facebook/index.php(25): Facebook\Facebook->__construct(Array) #1 {main} thrown in /home/redemulticomnews/www/facebook/facebook-php-sdk/Facebook.php on line 142