Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Normalizer\AbstractNormalizer" not found in /home/aipnbsfo/public_html/vendor/symfony/serializer/Normalizer/JsonSerializableNormalizer.php:24 Stack trace: #0 {main} thrown in /home/aipnbsfo/public_html/vendor/symfony/serializer/Normalizer/JsonSerializableNormalizer.php on line 24