Try the latest release of the News Feeds (RSS) module v04.00.01 and see if it persists.  Also, when reporting your issues, listing the versions of DNN and the module version that is giving you the issue helps others troubleshoot.

Thanks,

I am new to the DNN program. I tried the new Newsfeeder 4.0.1 version on one page of my DNN 4.9.1 site and it gave me trouble the first couple of times, but somehow started woking. I then added another newsfeeder module to another page with a different rss feed and got the error:

Feed 'http://vmware.simplefeed.net/rss/?f=88f10930-01de-11de-23f8-0019bbc54f6f' could not be loaded. Error: The element 'channel' has incomplete content. List of possible elements expected: 'title, link, description, language, copyright, managingEditor, webMaster, pubDate, lastBuildDate, category, generator, docs, cloud, ttl, image, textInput, skipHours, skipDays, rating, item' as well as any element in namespace '##other'.

I put that feed into the google reader and it worked fine.