404. That’s an error.
The requested URL /add?feedurl=http://signal.serenityfirefly.com/mmx/series/smartfeed.php/125/1498112269/7/0 was not found on this server. That’s all we know.
/add?feedurl=http://signal.serenityfirefly.com/mmx/series/smartfeed.php/125/1498112269/7/0