Error message with RSS feed

Hi there,

I am trying to set up the RSS feed for several blogs. But I get an error message that states that the RSS feed is invalid and that it is missing some fields. Is it referring to the collection fields? Or the RSS fields that we add when we activate the feed. If the latter is correct, what are the required feeds for RSS? Also is the refresh time in minutes?

Thank you.

Did you ever find a solution here? Im having similar problems.