Fatal error: Uncaught Error: Interface "Symfony\Component\HttpKernel\HttpKernelInterface" not found in /var/www/apache/dev/cal/web/vendor/symfony/http-kernel/HttpKernel.php:36 Stack trace: #0 {main} thrown in /var/www/apache/dev/cal/web/vendor/symfony/http-kernel/HttpKernel.php on line 36