Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Normalizer\SerializerAwareNormalizer" not found in /home/vincent/http/concrete5/concrete/vendor/symfony/serializer/Normalizer/AbstractNormalizer.php:28 Stack trace: #0 {main} thrown in /home/vincent/http/concrete5/concrete/vendor/symfony/serializer/Normalizer/AbstractNormalizer.php on line 28