Fatal error: Uncaught Error: Class "Drupal\Core\Cache\Context\RouteCacheContext" not found in /home/www/drupal8/test/core/lib/Drupal/Core/Cache/Context/RouteNameCacheContext.php:10 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/lib/Drupal/Core/Cache/Context/RouteNameCacheContext.php on line 10