Fatal error: Uncaught Error: Class "Drupal\path\Plugin\migrate\source\UrlAliasBase" not found in /home/.sites/939/site4167048/web/2020/core/modules/path/src/Plugin/migrate/source/d6/UrlAlias.php:15
Stack trace:
#0 {main}
  thrown in /home/.sites/939/site4167048/web/2020/core/modules/path/src/Plugin/migrate/source/d6/UrlAlias.php on line 15