Fatal error: Uncaught Error: Class "Drupal\path\Plugin\migrate\source\UrlAliasBase" not found in /home/www/drupal8/test/core/modules/path/src/Plugin/migrate/source/d6/UrlAlias.php:15
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/core/modules/path/src/Plugin/migrate/source/d6/UrlAlias.php on line 15