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 /var/www/www-root/data/www/exbest.net/modules/user/Facebook/Facebook.php:133 Stack trace: #0 /var/www/www-root/data/www/exbest.net/modules/user/social.php(104): Facebook\Facebook->__construct(Array) #1 /var/www/www-root/data/www/exbest.net/index.php(50): Social->action_fblogin() #2 {main} thrown in /var/www/www-root/data/www/exbest.net/modules/user/Facebook/Facebook.php on line 133