If you click on the link at the top of the forum (the one with the logo and 'Profiler Forum', it is a bad link and returns an error.
FWIW, the link is https://www.kemper-amps.com/wbb_suite_3/
Edit: That appears to be when I go into my control panel to look at my notifications. If I am inside a forum like this one, the link seems to work fine.
Edit #2: Breadcrumbs don't appear to be working properly either. when I did Edit 1 above, and then tried to click on 'Kemper Amps' at the beginning of the breadcrumb string, it also returned an error.