Fatal error: Uncaught Error: Interface "JMS\Serializer\Handler\HandlerRegistryInterface" not found in /home/kiwakim/stock/vendor/jms/serializer/src/JMS/Serializer/Handler/HandlerRegistry.php:9 Stack trace: #0 {main} thrown in /home/kiwakim/stock/vendor/jms/serializer/src/JMS/Serializer/Handler/HandlerRegistry.php on line 9