404. That’s an error.
The requested URL /add?source=atgs&feedurl=http%3A//www.vlad.blog.br/feeds/posts/default%3Falt%3Drss was not found on this server. That’s all we know.
/add?source=atgs&feedurl=http%3A//www.vlad.blog.br/feeds/posts/default%3Falt%3Drss