After the initial setup I noticed that “English (English)” is displayed in the dropdown box when it should say “Deutsch (German)”. I guess this dropdown in the GUI is always set to “English (English)” after the very first start.
If I switch languages and save it then it is correctly displayed again.
I noticed I have no graph data anywhere. It probably is a bug in my system.
Here’s the profile: fireinfo.ipfire.org - Profile 31458f5b43058085c63f324247452bb608fba216