Fatal error: Uncaught Error: Class "Drupal\Component\Annotation\Plugin\Discovery\AnnotatedClassDiscovery" not found in /home/www/drupal8/test/core/lib/Drupal/Core/Plugin/Discovery/AnnotatedClassDiscovery.php:11 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/lib/Drupal/Core/Plugin/Discovery/AnnotatedClassDiscovery.php on line 11