$ drush migrate-manifest mysql://mysite:mysite@localhost/mysite manifest.yml
Migration d6_aggregator_feed did not meet the requirements                                                                                                      [error]
PHP Fatal error:  Call to a member function getConfigDependencyName() on a non-object in /workspace/mysite8/core/modules/entity/lib/Drupal/entity/EntityDisplayBase.php on line 162
PHP Stack trace:
PHP   1. {main}() /home/michael/.composer/vendor/drush/drush/drush.php:0
PHP   2. drush_main() /home/michael/.composer/vendor/drush/drush/drush.php:16
PHP   3. _drush_bootstrap_and_dispatch() /home/michael/.composer/vendor/drush/drush/drush.php:61
PHP   4. drush_dispatch() /home/michael/.composer/vendor/drush/drush/drush.php:98
PHP   5. call_user_func_array() /home/michael/.composer/vendor/drush/drush/includes/command.inc:182
PHP   6. drush_command() /home/michael/.composer/vendor/drush/drush/includes/command.inc:182
PHP   7. _drush_invoke_hooks() /home/michael/.composer/vendor/drush/drush/includes/command.inc:214
PHP   8. call_user_func_array() /home/michael/.composer/vendor/drush/drush/includes/command.inc:363
PHP   9. drush_migrate_manifest() /home/michael/.composer/vendor/drush/drush/includes/command.inc:363
PHP  10. Drupal\migrate\MigrateExecutable->import() /workspace/mysite8/core/modules/migrate_drupal/migrate.drush.inc:30
PHP  11. Drupal\migrate\Plugin\migrate\destination\ComponentEntityDisplayBase->import() /workspace/mysite8/core/modules/migrate/lib/Drupal/migrate/MigrateExecutable.php:281
PHP  12. Drupal\Core\Entity\Entity->save() /workspace/mysite8/core/modules/migrate/lib/Drupal/migrate/Plugin/migrate/destination/ComponentEntityDisplayBase.php:31
PHP  13. Drupal\Core\Config\Entity\ConfigStorageController->save() /workspace/mysite8/core/lib/Drupal/Core/Entity/Entity.php:277
PHP  14. Drupal\entity\EntityDisplayBase->preSave() /workspace/mysite8/core/lib/Drupal/Core/Config/Entity/ConfigStorageController.php:318
PHP  15. Drupal\Core\Config\Entity\ConfigEntityBase->preSave() /workspace/mysite8/core/modules/entity/lib/Drupal/entity/EntityDisplayBase.php:147
PHP  16. Drupal\entity\EntityDisplayBase->calculateDependencies() /workspace/mysite8/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php:279
Drush command terminated abnormally due to an unrecoverable error.                                                                                              [error]
Error: Call to a member function getConfigDependencyName() on a non-object in /workspace/mysite8/core/modules/entity/lib/Drupal/entity/EntityDisplayBase.php,
line 162