404. That’s an error.
The requested URL /add?source=atgs&feedurl=http%3A%2F%2F74.ru%2Frss%2Ftype%2F74.ru%2Fnews.xml was not found on this server. That’s all we know.
/add?source=atgs&feedurl=http%3A%2F%2F74.ru%2Frss%2Ftype%2F74.ru%2Fnews.xml