Fatal error: Uncaught Error: Class "Drupal\Core\Controller\ControllerBase" not found in /home/www/drupal8/test/core/modules/config/tests/config_test/src/ConfigTestController.php:12
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/core/modules/config/tests/config_test/src/ConfigTestController.php on line 12