Issue with my RSS feed

I'm using a third party premium plugin by http://www.realtyna.com on a real estate startup site. It uses custom post types and creates an RSS feed of the property listings I enter. I was very excited to find this RSS feed displays my featured images but I have an issue with it NOT displaying the post description/excerpt and only a "No description is available" line where it should be. (see attached image) I'm getting little to no help from the developer as they have not yet acknowledged there is an issue. I'm not a developer/coder but can anyone give me a hint how I might troubleshoot this problem myself? The site is in maintenance mode but I will provide login credentials if needed.