Whenever I try to change my forum picture, I get the notification "Oh no! This isn't a valid image!"

I use the right htpps code and used different picture hosting sites, Imgur, too.

what's the URL you're trying to use?

https://imgur.com/jCbldRl

You need this link https://i.imgur.com/jCbldRl.png It's always gotta end in "png" "jpg" "gif" etc