Fatal error: Uncaught Error: Class "Drupal\Component\Plugin\Derivative\DeriverBase" not found in /home/www/drupal8/test/core/modules/migrate_drupal/src/Plugin/migrate/source/ContentEntityDeriver.php:14
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/core/modules/migrate_drupal/src/Plugin/migrate/source/ContentEntityDeriver.php on line 14