Classic creature display images not working

Hello!

I have noticed that none of the images returned in the https://us.api.blizzard.com/data/wow/media/creature-display/{displayId}?namespace=static-classic-us API call are working, all 3 of them (portrait, rotate, and zoom) return an AccessDenied error.

For example, https://render-classic-us.worldofwarcraft.com/npcs/zoom/creature-display-40.jpg. (Retail URLs are working, though, https://render-us.worldofwarcraft.com/npcs/zoom/creature-display-40.jpg).

Thanks a lot.