Fatal error: Uncaught Error: Class "FacebookAds\Object\ServerSide\Singleton" not found in /home/bariatric/public_html/api/vendor/facebook/php-business-sdk/src/FacebookAds/Object/ServerSide/AsyncClient.php:33 Stack trace: #0 {main} thrown in /home/bariatric/public_html/api/vendor/facebook/php-business-sdk/src/FacebookAds/Object/ServerSide/AsyncClient.php on line 33