Fatal error: Uncaught Error: Class 'Twig\Extension\AbstractExtension' not found in /home/benjamincb/demos/acdg-site/vendor/friendsofsymfony/http-cache-bundle/src/Twig/CacheTagExtension.php:21 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg-site/vendor/friendsofsymfony/http-cache-bundle/src/Twig/CacheTagExtension.php on line 21