Fatal error: Uncaught Error: Class 'Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer' not found in /home/itscm/dev.its.cm/webserivesits/vendor/api-platform/core/src/Serializer/AbstractItemNormalizer.php:48 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/webserivesits/vendor/api-platform/core/src/Serializer/AbstractItemNormalizer.php on line 48