Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Normalizer\AbstractNormalizer" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\serializer\Normalizer\AbstractObjectNormalizer.php:42 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\serializer\Normalizer\AbstractObjectNormalizer.php on line 42