Fatal error: Uncaught Error: Class 'Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer' not found in C:\SistemasPHP\observatorio4\vendor\symfony\serializer\Normalizer\PropertyNormalizer.php:33 Stack trace: #0 {main} thrown in C:\SistemasPHP\observatorio4\vendor\symfony\serializer\Normalizer\PropertyNormalizer.php on line 33