Fatal error: Uncaught Error: Class 'JMS\Serializer\Twig\SerializerBaseExtension' not found in /home/ffl2020/public_html/vendor/jms/serializer/src/Twig/SerializerExtension.php:17 Stack trace: #0 {main} thrown in /home/ffl2020/public_html/vendor/jms/serializer/src/Twig/SerializerExtension.php on line 17