Fatal error: Uncaught Error: Interface "Drupal\Core\Routing\AccessAwareRouterInterface" not found in /home/www/drupal8/test/core/lib/Drupal/Core/Routing/AccessAwareRouter.php:18 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/lib/Drupal/Core/Routing/AccessAwareRouter.php on line 18