404. That’s an error.
The requested URL /add?feedurl=%0D%0Ahttp%3A%2F%2Fwww.chip.de%2Frss%2Frss_software_news.xml was not found on this server. That’s all we know.
/add?feedurl=%0D%0Ahttp%3A%2F%2Fwww.chip.de%2Frss%2Frss_software_news.xml