Fatal error: Uncaught Error: Class 'Symfony\Component\Serializer\Normalizer\ObjectNormalizer' not found in /home/peverde/public_html/vendor/symfony/serializer/Tests/Fixtures/StaticConstructorNormalizer.php:19 Stack trace: #0 {main} thrown in /home/peverde/public_html/vendor/symfony/serializer/Tests/Fixtures/StaticConstructorNormalizer.php on line 19