https://coffeetime.freeflarum.com/
In the UK due to a very stupid online harm law introduced by our current government, Imgur have decided that we cannot view images uploaded any more. They feel this is a simple way to not bother with the complex compliance required by the UK. My forum (Coffeetime) is full of this:

Inline image
ALL images ever posted have now turned into this, so the knowledgebase is now useless and a lot of posts completely unhelpful to users. Obviously this is not a flarum fault, or your fault and users outside the UK can still see the images, as can UK users using a VPN to say they are not in the UK.
I do keep all uploads off the forum to we don’t use any of the 1gb disk space allocated to us, mainly because I can’t find a way compress all uploads, or clearly how to easily set a file size limit of 50K.
I have found another image hosting service called https://freeimage.host/
They also have a plugin that should work if the code is placed in the HTML head of a forum. https://freeimage.host/plugin
I have tried it, but it doesn’t seem to work, I wondered if you had a few minutes if you could take a look?
Dave