404. That’s an error.
The requested URL /add?source=atgs&feedurl=http%3A//feedblog.ameba.jp/rss/ameblo/newtubuyaki/rss20.xml was not found on this server. That’s all we know.
/add?source=atgs&feedurl=http%3A//feedblog.ameba.jp/rss/ameblo/newtubuyaki/rss20.xml