Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\RequestMatcher" not found in D:\Apache24\www\trace\新建文件夹\Backstage\vendor\symfony\http-foundation\ExpressionRequestMatcher.php:21 Stack trace: #0 {main} thrown in D:\Apache24\www\trace\新建文件夹\Backstage\vendor\symfony\http-foundation\ExpressionRequestMatcher.php on line 21