404. That’s an error.
The requested URL /add?feedurl=http://vsevesti.com/rss/ru/news/location/all/category/press-releases/date/01-09-2020/rss.xml was not found on this server. That’s all we know.
/add?feedurl=http://vsevesti.com/rss/ru/news/location/all/category/press-releases/date/01-09-2020/rss.xml