404. That’s an error.
The requested URL /add?source=atgs&feedurl=http%3A%2F%2Fwww.ntnu.no%2Fntnu-theme%2Fimages%2Flogoicon.ico was not found on this server. That’s all we know.
/add?source=atgs&feedurl=http%3A%2F%2Fwww.ntnu.no%2Fntnu-theme%2Fimages%2Flogoicon.ico