Fatal error: Uncaught Error: Class "Drupal\field_ui\Form\EntityViewDisplayEditForm" not found in /home/www/drupal8/test/core/modules/field_layout/src/Form/FieldLayoutEntityViewDisplayEditForm.php:16 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/field_layout/src/Form/FieldLayoutEntityViewDisplayEditForm.php on line 16