Fatal error: Uncaught Error: Class "Drupal\file_test\Form\FileTestForm" not found in /home/qcsvlel/www/core/modules/file/tests/file_test/src/Form/FileRequiredTestForm.php:12 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/modules/file/tests/file_test/src/Form/FileRequiredTestForm.php on line 12