Broken icon on admin page

On the admin page (/admin) of an installation of gitlab-ce there used to be an icon with the text "Update asap" or other message. The last two updates I applied resulted in a "broken image". Copying and pasting the image url onto a new browser tab does indeed return an error page about malformed xml (for instance, https://version.gitlab.com/check.svg?gitlab_info=eyJ2ZXJzaW9uIjoiMTEuMy40In0=). The returned page is, indeed, empty. In fact, the HTTP request returns an HTTP 404.

So either the page is missing on version.gitlab.com, or the reference to it is not ok.