The "twemoji" library was added to replace emoji characters with images. I guess in case the OS/browser doesn't support some of the emoji? This was done back in https://forge-allura.apache.org/p/allura/git/merge-requests/135/
We self-hosted the .js file for twemoji but not the images. And now the images from maxcdn aren't loading. https://github.com/twitter/twemoji#cdn-support
I think we should just remove twemoji and rely on native emoji rendering, I think its good enough. And that's what's happening right now since the images don't load 😄