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 /data/web/virtuals/221596/virtual/www/libs/facebook/graph-sdk/src/Facebook/Facebook.php:139 Stack trace: #0 /data/web/virtuals/221596/virtual/www/include/facebook/login.php(10): Facebook\Facebook->__construct(Array) #1 {main} thrown in /data/web/virtuals/221596/virtual/www/libs/facebook/graph-sdk/src/Facebook/Facebook.php on line 139