Error: Feed failed! Causes may be (1) No data found for RSS feed https://cps-mediawiki.cs.rptu.de/index.php/User:Krystle49A; (2) There are no items are available for this feed; (3) The RSS feed does not validate.
Please verify that the URL https://cps-mediawiki.cs.rptu.de/index.php/User:Krystle49A works first in your browser and that the feed passes a validator test.