@maximilian.mayrl , Is this a trail license? If so, maybe you can check if it's trail period is expired. If it is a normal paid license, did that user recently added or modified his/her service subscription? I am using the RDP Funds API and I have no issue encountered today.

SCOPE = "trapi
TOKEN_ENDPOINT = "https://api.refinitiv.com/auth/oauth2/v1/token"
expires_at = time.time()

auth_data = {"username": pen.settings.LIPPER_USERNAME, "password": pen.settings.LIPPER_PASSWORD, "grant_type": "password","scope": SCOPE, "takeExclusiveSignOnControl": "true"
}

refresh_data = {"refresh_token": lipper_refresh_token, "username": pen.settings.LIPPER_USERNAME, "grant_type": "refresh_token"
}

def get_token():
    global lipper_token, expires_at, lipper_refresh_token, rest_token_error_messages
    # global datascope_token
    if lipper_token == '' or expires_at < time.time():
        if lipper_refresh_token == '':
            respond = requests.post(TOKEN_ENDPOINT, headers = {"Accept": "application/json"}, data = auth_data, auth = (CLIENT_ID, CLIENT_SECRET))
        else:
            respond = requests.post(TOKEN_ENDPOINT, headers = {"Accept": "application/json"}, data = refresh_data, auth = (CLIENT_ID, CLIENT_SECRET))

        if respond.status_code != 200:
            return None
        else:
            respond_dict = respond.json()
            lipper_token = respond_dict['access_token']
            lipper_refresh_token = respond_dict['refresh_token']
            refresh_data['refresh_token'] = lipper_refresh_token
            expires_at = time.time() + int(respond_dict['expires_in']) - 10
            SCOPE = respond_dict['scope']
            auth_data['scope'] = SCOPE
    return lipper_token

@maximilian.mayrl

You may need to log the error message from the body of the response message.

For more information, please refer to the Limitations and Guidelines for the RDP Authentication Service article.