In order to successfully embed an image, you need to use the direct link to it, which usually ends with .jpg, .jpeg or similar.
That means, as an example by using your recent trade topic:
https://forums.d2jsp.org/topic.php?t=107690016&f=268Instead of using this:
Code
[img]https://imgur.com/a/Lnq3P5I[/img]
You need to use this:
Code
[IMG]https://i.imgur.com/d0cp4kg.jpeg[/IMG]
You can easily get said direct link by opening the imgur links which you linked, and once you see the picture simply right click it and then hit "copy direct link".