Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Fragment\FragmentHandler" not found in /var/www/html/app/vendor/symfony/http-kernel/DependencyInjection/LazyLoadingFragmentHandler.php:24 Stack trace: #0 {main} thrown in /var/www/html/app/vendor/symfony/http-kernel/DependencyInjection/LazyLoadingFragmentHandler.php on line 24