Fatal error: Uncaught Error: Interface "Drupal\Core\Config\Entity\ConfigEntityInterface" not found in /home/www/drupal8/test/modules/migrate_plus/src/Entity/MigrationGroupInterface.php:10
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/modules/migrate_plus/src/Entity/MigrationGroupInterface.php on line 10