I'm just getting a broken jpg image. Same deal in browser and using the Voyager app, so I can only assume it's something on the Pawb side.
And just today I noticed a similar issue with anything coming from lemmy.sdf.org. This could be either posts hosted on that site, or posts by users from the site. This community for example the recent posted images aren't loading: https://pawb.social/c/funhole@lemmy.sdf.org
with lemmy.sdf.org, something is wrong with the instance, I get connection refused on the instance itself.
Your other example works fine for me, can you access the image directly? https://files.catbox.moe/fpvt6y.jpg
At the time, while vernacular correct, technically not true. The server was responding by actively refusing the request. It was "down" in the sense that you could not access it. It was up in the sense that something was running there.