Fatal error: Uncaught Error: Class "Twig\Extension\AbstractExtension" not found in /var/www/html/demo.ininli.ca/releases/16/vendor/symfony/twig-bridge/Extension/SerializerExtension.php:20 Stack trace: #0 {main} thrown in /var/www/html/demo.ininli.ca/releases/16/vendor/symfony/twig-bridge/Extension/SerializerExtension.php on line 20