Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer" not found in /home/akg/public_html/craft/vendor/symfony/serializer/Normalizer/PropertyNormalizer.php:40 Stack trace: #0 {main} thrown in /home/akg/public_html/craft/vendor/symfony/serializer/Normalizer/PropertyNormalizer.php on line 40