As is being discussed on the Discord, many people are facing an issue with image hosting.
Discord's own hosting isn't designed for long-term linking/reliability. Imgur has blocked the UK which impacts not only UK users uploading to the site, but also their ability to see images that other people are sharing.
So I'm going to try a few new ones and see what we get.

ImgBB.

This is Stella.

She is hosted on ImgBB. If you don't see a woman in a yellow dress with a sword, let me know.

Postimage

This is Hannah.

She is hosted on Postimage. If you don't see a cool gladiator, let me know.

ImageKit (possibly designed only for business?)

This is Zenda.

She is hosted on ImageKit. If you don't see a woman with glowing eyes, let me know.

ImageShack (frog logo is a plus)

This is Deirdre.

She is hosted on ImageShack. If you don't see a platinum blonde elf, let me know.