404. That’s an error.
The requested URL /add?source=atgs&feedurl=%20http%3A//www.myexpresswebservices.com/store/1988076/index.rss was not found on this server. That’s all we know.
/add?source=atgs&feedurl=%20http%3A//www.myexpresswebservices.com/store/1988076/index.rss