404. That’s an error.
The requested URL /add?feedurl=http%3A%2F%2Fwww.clarin.com%2Fdiario%2Fhoy%2Fum%2Fsumariorss.xml was not found on this server. That’s all we know.
/add?feedurl=http%3A%2F%2Fwww.clarin.com%2Fdiario%2Fhoy%2Fum%2Fsumariorss.xml