Fatal error: Uncaught Error: Class "Twig\Extension\AbstractExtension" not found in /var/www/html/src/vendor/jms/serializer/src/Twig/SerializerBaseExtension.php:9 Stack trace: #0 {main} thrown in /var/www/html/src/vendor/jms/serializer/src/Twig/SerializerBaseExtension.php on line 9