Images not uploading

I’d really appreciate your help with this issue. I’ve searched forums and people seem to have had the same problem years ago, but I can’t find anything recent, and none of their solutions from then seem to work now.
Uploading images to my new blog posts has always worked fine until today – I upload the image – it all seems to work fine, and I can see the image on the “Edit Post” screen, and resize it etc. But when I publish the post and check it, the image does not appear – only the title of the image. If I click on this title it says “We cannot complete this request, remote data could not be fetched”

My website is here: http://jadelizzie.com/

Many thanks for your help.