Hi,
It still works. However, it is displayed below your aikon menu module as the z-index of that menu bar at the top is set to 9999999 in
nemogaarden.dk.dedi5139.your-server.de/m...assets/css/basic.css
and thus it gets the priority over the notifyjs popup box.
Also, if you check the header area in the HTML of that page, you can see that there is no file "custom.css" loaded and that the CSS of your message is also not loaded on the page. I don't think that it's linked to the modifications I did as I didn't modify a "custom.css" file or prevented one to be loaded.