Error code: 4711, Invalid access token

I’m trying to send a GET request to those APIs:
and I’m getting this message: “message”: “Invalid access token, does not contain scopes:[user:read:list_users:master].”
although I added the “user:read:list_users:master” to the scopes of my app.

However, while I’m sending a POST req to this API:
it success and I can see the access token under the “scope”: “user:read:user:admin user:read:list_users:master user:read:user:master”.

Trying to find out if there is a problem with the first API…
Thanks in advance