Forgot to mention, at least when you post in a thread, the moderators have to review the image before it's visible on line. And until they approve it, you will see it, but others will only see a placeholder for the image until it's officially approved. Not sure how they handle images in PMs but could be the same way. As a Rockstar, images I post are immediately available to everyone in a thread, or to the recipient of a PM that I sent.
When I try to upload an image under Private Messages, I place my cursor on the Upload Tab.  However, nothing happens.  It does not activate. Please advise. Jerry 3/20/2021
Uploading an Image