Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Extension\Extension" not found in /home/authent1/public_html/listassorys/phpbb/vendor/symfony/http-kernel/DependencyInjection/Extension.php:21 Stack trace: #0 {main} thrown in /home/authent1/public_html/listassorys/phpbb/vendor/symfony/http-kernel/DependencyInjection/Extension.php on line 21