Fatal error: Uncaught Error: Interface "Drupal\Core\Routing\EnhancerInterface" not found in /home/www/drupal8/test/core/lib/Drupal/Core/Routing/Enhancer/RouteEnhancerInterface.php:19
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/core/lib/Drupal/Core/Routing/Enhancer/RouteEnhancerInterface.php on line 19