I had some issues with my new Mac (M2, Ventura ) with Insta…
I moved the file to the drag-n-drop area. And it seemed to be working.
But when I clicked on “next” to enter the description. All the Images where gone… Just a blank area was displayed… But I was able to send the post.
I had to use Safari (Google Chrome works as well).
I have checked my recent Insta posts and found one where that already happend
There it affected only at the last image of the post (and I didn’t noticed ) . This was uploaded on an older Mac (Macbook pro 2012 with Catalina 10.12).