I use Drupal 8.1.10. The site is almost all core (only about Admin_Toolbar, Token, Metatag are installed).
As can be seen here, the module should work after cron run, but just won't.
Even though every node I check seems to be included, no sitemap is generated, and /sitemap.xml isn't found (404) after any cron run.
The only reason I can think of is the fact that unlike in the Drupal 7 version, in Drupal 8, I can't include content types in the sitemap manually (i.e from a content type edit backend form).
no relevant problems under drush ws --full