ZONE API : media give in asset is forbidden

Hello guys.

I try to retrieve the media give by the endpoint zone, but for some dungeon and raid ( like atalhakar or wod dungeon) i get a 403 forbidden error.

In my console i try to get the asset from zone 237 (atalhakkar). The blizzard Api put an url in asset , but when i try to connect to this url i get a 403 forbidden

This picture show what i get
https:// ibb .co/VwLxtrG