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