feed does not work

I’ve been subscribed to it for a few years, noticed that it’s been missing for a while now.
The site itself is working, and the feed looks okay at a glance:
Feed settings on NewsBlur itself show that parsing works: “2018-12-13 14:12:31 OK (200)”, but the feed itself is still empty.

PS: Just noticed that site settings’ page title is “Fix a misbehaving site”.