My RSS reader, Thunderbird, is suddenly throwing errors on all my ani.social feeds (communities, inbox). Trying to verify the URLs through the feed subscriptions window I get a "The Feed URL is not authorized." message.

Looking at the error log, it's complaining about not well formed XML and clicking on the link results in an attempt to complete a Cloudflare "Verify you are human" challenge.

I'm not getting these issues on any other instances. RSS getting blocked like this is the reason I left Reddit for Lemmy in the first place.