Fatal error: Uncaught Error: Class "Drupal\locale\Form\TranslateFormBase" not found in /home/www/drupal8/test/core/modules/locale/src/Form/TranslateEditForm.php:14 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/locale/src/Form/TranslateEditForm.php on line 14