Wiki: No more "more pages"

Hi there,

we are using GitLab CE in version 12.10.3 (e01ceba1b49) (standalone omnibus installation)

We recently noticed some of the pages in our wiki (using the built-in wiki) are missing. A checkout of the wiki repository confirmed, that the pages are still there, but the previous "more pages" button/link on the sidebar is gone.

So at the moment, we can not access our wiki pages using the GitLab frontend at the moment.

Unfortunately I could not find related issues to this (are we really the only ones with this issue?) so I decided to open a new one.