Fatal error: Uncaught Error: Class "Drupal\Core\Entity\EntityForm" not found in /home/www/drupal8/test/modules/migrate_tools/src/Form/MigrationGroupFormBase.php:17 Stack trace: #0 {main} thrown in /home/www/drupal8/test/modules/migrate_tools/src/Form/MigrationGroupFormBase.php on line 17