Fatal error: Uncaught Error: Class "Drupal\Core\Entity\Query\Sql\QueryAggregate" not found in /home/www/drupal8/test/core/modules/workspaces/src/EntityQuery/QueryAggregate.php:10 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/workspaces/src/EntityQuery/QueryAggregate.php on line 10