What to do if Yandex WebMaster does not accept a sitemap?

Question

Create a sitemap

The site has a main page - index.php
From it there are no links to others, because the transition to the rest of the content is carried out through authorization through VK.
Because of this, the various sitemap generators only see the home page. As a result, Yandex Webmaster gives me an error - There are no Sitemap files used by the robot