404. That’s an error.
The requested URL /add?feedurl=http://www.messefrankfurt.com/frankfurt/en/media/textilmessen/heimtextil/frankfurt/texte.rss.xml was not found on this server. That’s all we know.
/add?feedurl=http://www.messefrankfurt.com/frankfurt/en/media/textilmessen/heimtextil/frankfurt/texte.rss.xml