403 for achievement media asset icon


The achievements with the IDs 13138 and 13196 are returning an icon asset URL that is not working.
E.g. the following API call

"assets": [
        "key": "icon",
        "value": "https://render-eu.worldofwarcraft.com/icons/56/inv_8xp_encrypted01.jpg"

But this URL is only returning a 403. Can you verify that? Is there a wrong URL returned from the API or is the icon not uploaded on the server?