something is wrong with my rss feed?

hello,
A few days ago, my rss feed stopped updating, and now I get this message when I try to view the feed: <!– Page not cached by WP Super Cache. No closing HTML tag. Check your theme. –>

I have looked and I can’t find where the error is so I can fix it?
Will someone please help me??

My site is: https://www.angelsezine.com/

Thank you very much in advance!