Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer" not found in /home/ntpcbgtpp/public_html/mat1/vendor/api-platform/core/src/Serializer/AbstractItemNormalizer.php:54 Stack trace: #0 {main} thrown in /home/ntpcbgtpp/public_html/mat1/vendor/api-platform/core/src/Serializer/AbstractItemNormalizer.php on line 54