The feed [RSS URL] can't be retrieved to create this RSS email. Learn more.
This error appears when HubSpot can't parse the RSS feed to create an RSS email. This issue is general the result of various issues with how the RSS feed is coded.
To resolve this issue, you'll need to have your external site administrator examine your RSS feed. To test whether the RSS feed is valid, please run the RSS URL through a validation service to see what errors are occurring in the RSS feed. If you can resolve the issues with the feed, try creating the RSS email in HubSpot again. If the issue persists, please contact Support.