I don't see anything on this page but a couple of headings and some pictures, with large swaths of whitespace, bullets without any item, etc. Neither in Firefox nor Chromium.

I had to switch to reader mode in Firefox to get any text?

The same behaviour occurs on all the website...

What gives?

Here's a capture for anyone interested: https://demo.intellique.org/nextcloud/index.php/s/xM6QCQXReF...