No results for "Get Current User's Library Albums"

Hi!
We noticed for some Amazon Music users; there’s no results returned for the endpoint “Get Current User’s Library Albums” while there’s elements here: https://music.amazon.fr/my/albums

Is it related to the user Amazon Music offer? Like “FREE” or “PRIME” can’t have access but “UNLIMITED” yes etc? And if so, can you please be more specific?