MrMessy I've got this error too.
Have we run out of space to store forum images on imgur.com or is there some regional setting that's incorrect?
Edit: I can see what's happened. This is posted on the Imgur site...
Imgur access in the United Kingdom
From September 30, 2025, access to Imgur from the United Kingdom is no longer available. UK users will not be able to log in, view content, or upload images. Imgur content embedded on third-party sites will not display for UK users.
I think this might be an unintended consequence of the GDPR regulations.