Fatal error: Uncaught Error: Class 'AbstractOrder' not found in /opt/bitnami/apache/htdocs/taxi_app/WebServices/worldpay-php/lib/APMOrder.php:4 Stack trace: #0 {main} thrown in /opt/bitnami/apache/htdocs/taxi_app/WebServices/worldpay-php/lib/APMOrder.php on line 4