My app was sending profile background images for years, but now it has a problem.
API call has regular return:
Response code is 200.
[profile_background_image_url] => http://pbs.twimg.com/profile_background_images/435409141532594176/GGfaA2Bl.jpeg
However, background image is always 404 Not Found.
Sending tweets, etc is OK.
Any ideas?
