Just updated to the newest version and now the settings page for Sitemaps is no longer working. Error is as follows
Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.configurable_language.collection" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 206 of /{platform folder}/web/core/lib/Drupal/Core/Routing/RouteProvider.php).
Fixed
4.0
Code
That's fixed; new hotfix release is coming momentarily.
Automatically closed - issue fixed for 2 weeks with no activity.