Fatal error: Uncaught Error: Class "JMS\Serializer\Handler\HandlerRegistry" not found in /var/www/html/src/vendor/jms/serializer/src/Handler/LazyHandlerRegistry.php:11 Stack trace: #0 {main} thrown in /var/www/html/src/vendor/jms/serializer/src/Handler/LazyHandlerRegistry.php on line 11