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:

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: