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