Fatal error: Uncaught Error: Interface 'Symfony\Component\Serializer\NameConverter\AdvancedNameConverterInterface' not found in /home/devmecseminars/public_html/mec/vendor/symfony/serializer/NameConverter/MetadataAwareNameConverter.php:20 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/serializer/NameConverter/MetadataAwareNameConverter.php on line 20