Fatal error: Uncaught Error: Class "Drupal\Core\Entity\EntityStorageBase" not found in /home/www/drupal8/test/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php:36 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php on line 36