Uuhhh  ,

not sure .

To stick Imgur photos here you hit the chainlink  that pops-up from hitting the picture icon and paste the image address .

However ,

I used to use Imgur and it stopped allowing me to add photos to my Imgur account or even paste any more existing photos from there to here   --- but that is an Imgur thing . no idea  .

I started uploading directly here from my computer after that .