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 /home2/digithuw/public_html/marketing-seo-tools/core/library/facebook/Facebook.php:139 Stack trace: #0 /home2/digithuw/public_html/marketing-seo-tools/core/controllers/facebook.php(36): Facebook\Facebook->__construct(Array) #1 /home2/digithuw/public_html/marketing-seo-tools/core/app.php(162): require('/home2/digithuw...') #2 /home2/digithuw/public_html/marketing-seo-tools/index.php(25): require('/home2/digithuw...') #3 {main} thrown in /home2/digithuw/public_html/marketing-seo-tools/core/library/facebook/Facebook.php on line 139