WP RSS feed suddenly stopped working

Hello,

This RSS feed suddenly stopped working today:

https://stevenemerson.com/?feed=rss
https://stevenemerson.com/feed

It passes validation:

https://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Fstevenemerson.com%2F%3Ffeed%3Drss

I’ve noticed this problem posted before, but the answers don’t help me solve the problem. Is this an intermittent bug w/ WP or is something else possibly going on?

Thanks,
Seth