RSS Error: Invalid HTML: Named entity expected. Got none

Just moved my site to Webflow. There were a few blogs that would syndicate my content that they ingested via my RSS. I gave them the url for my new RSS feed, and they are getting an error.

Specifically, I gave them this url: http://www.selectsoftwarereviews.com/blog/rss.xml

When put into an RSS validator, it throws the error “Invalid HTML: `Named entity expected. Got none.”

Is this just a flaw in the Webflow RSS?

Here is my public share link: https://preview.webflow.com/preview/ssr-project?utm_medium=preview_link&utm_source=designer&utm_content=ssr-project&preview=3f920224912b1f3493624b1ce7791853&mode=preview