Fatal error: Uncaught Error: Class "Drupal\file\FileAccessControlHandler" not found in /home/www/drupal8/test/core/modules/file/tests/file_test/src/FileTestAccessControlHandler.php:13 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/file/tests/file_test/src/FileTestAccessControlHandler.php on line 13