Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Extension\Extension" not found in /home/lun45tyra31/public_html/demo/vendor/symfony/http-kernel/Bundle/BundleExtension.php:28 Stack trace: #0 {main} thrown in /home/lun45tyra31/public_html/demo/vendor/symfony/http-kernel/Bundle/BundleExtension.php on line 28