I can not access my Advanced configuration dialogs from linux, works OK on Windows 10.
Basic dialogs work OK on linux. Browser is Chromium V74.
Have you tried any other browsers from within linux? If its working on windows 10, I'd be inclined to think it was something with chromium. I konw there was issues with chrome veresion 77 but that blocked access.
I'd just start with a different browser and see if it works.