You said:
You should use pic8 shortlink for it to work, not the link in your browser's address bar.
Maybe that's the case. I don't know. So you're saying, that the image upload took so long that it timed out?
You deleted the post where I made that comment because you posted the link in your address bar that isn't the link to your image but pic8 UI. That's why it can't generate a thumbnail.
The thumbnail is only generated after pic8 returns the shortlink.
(post is archived)