Images not showing up, saying "requested URL is not allowed"

I’m getting a lot of feeds with broken images in them, and when I try to open the image in a new tab, it only says the message “requested URL is not allowed”. Might have something to do with lack of permissions from Cloudflare or Let’s Encrypt?

Engrish.com is an example of every image showing up as broken in feeds.

Looks like engrish.com is having ssl issues: