8 – Class ‘DrupalCoreRoutingRouteSubscriberBase’ not found

I just figured out that one core module from Drupal 8.9.13 is not found.

The page says that

Fatal error: Class 'DrupalCoreRoutingRouteSubscriberBase' not found in /app/docroot/core/modules/config_translation/src/Routing/RouteSubscriber.php on line 13

I was new to Drupal 8 and it’s a core module.

Thanks for your help