The images pass and validate and are visible, but after I approve, then they do not display images in the Card Manager, just a “broken image”.
I go in and change (replace the image) and again, looks good, approve, then broken image displayed at the page that says “Card is Created” and in the Card Manager display.
I posted at tweet with one of the cards, you can see that the images are NOT working!
There is nothing wrong with the images as I upload them, they meet all specification. It is something on the Twitter side with images sizes not being created or replicated.