Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Exception\HttpException' not found in /home/noct-c/www/tanakahashi/vendor/symfony/http-kernel/Exception/ServiceUnavailableHttpException.php:17 Stack trace: #0 {main} thrown in /home/noct-c/www/tanakahashi/vendor/symfony/http-kernel/Exception/ServiceUnavailableHttpException.php on line 17