Fatal error: Uncaught Error: Class "Drupal\Core\Routing\RouteSubscriberBase" not found in /home/www/drupal8/test/core/modules/node/src/EventSubscriber/NodeAdminRouteSubscriber.php:12 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/node/src/EventSubscriber/NodeAdminRouteSubscriber.php on line 12