I can't subscribe to https://vividcortex.com/feed/

I can’t subscribe to https://vividcortex.com/feed/, I get the message, “This address does not point to an RSS feed or a website with an RSS feed.” If I paste the url into Chrome, it looks like correct atom xml to me.


additional information: feedvalidator.org considers it a valid feed: http://feedvalidator.org/check.cgi?ur…