Ok so I have a temporary solution for you.
Use Google Chrome and access the imgur site. Right click on the picture and click on 'copy link' which is:
https://i.imgur.com/U9JgXGb.jpginstead of
https://imgur.com/U9JgXGbThen copy it between img tags
[.img]https://i.imgur.com/U9JgXGb.jpg[./img]
(remove dots)