RSS Feed not valid

Trying to update a few places where I have my RSS feed hosted on other sites (not mine), I noticed that the RSS feed was not found and considered invalid. It was working before and I’m not certain when the issue might have started.

I’ve searched through the forum for solutions and have saved my permalink settings and that did not change the feed not being found. Any other ideas? I have another website with the same theme and it is not having the same problem, so I do not think it is theme related.

The feed theme should be at https://www.autumnwriting.com/feed. It shows the blog logo, but no posts. Thanks for any help and suggestions.