Fatal error: Uncaught Error: Class "ApiPlatform\Serializer\AbstractItemNormalizer" not found in /home/flighto/e-commerce/vendor/api-platform/core/src/Hal/Serializer/ItemNormalizer.php:34 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/api-platform/core/src/Hal/Serializer/ItemNormalizer.php on line 34