Fatal error: Uncaught Error: Class 'Zend\Diactoros\AbstractSerializer' not found in /var/www/microservices/vendor/zendframework/zend-diactoros/src/Response/Serializer.php:22 Stack trace: #0 {main} thrown in /var/www/microservices/vendor/zendframework/zend-diactoros/src/Response/Serializer.php on line 22