OK, I figured it...
From Imgur we can't use the link they give us to share:
https://imgur.com/pjouLLQ
Instead we have to click the 3 dots, select "Get Share Links", and copy the BBCode link:
https://i.imgur.com/pjouLLQ.png
When I hit the "Insert an Image" button and plug in the BBCode link, it works:
![[Image: pjouLLQ.png]](https://i.imgur.com/pjouLLQ.png)
From Imgur we can't use the link they give us to share:
https://imgur.com/pjouLLQ
Instead we have to click the 3 dots, select "Get Share Links", and copy the BBCode link:
https://i.imgur.com/pjouLLQ.png
When I hit the "Insert an Image" button and plug in the BBCode link, it works: