Broken RSS Feed After WP Update

Hello All,

Since I updated my WordPress to the newest version, I noticed my rss feed is broken. Any insight would be greatly appreciated!

Here’s my Blog: https://www.TheMaineRealEstateGuy.com

Error Message on Feed Validator: https://feedvalidator.org/check.cgi?url=http%3A%2F%2Fthemainerealestateguy.com%2Ffeed%2F#l81

Thanks! Lorri-Anne Driscoll