403 Forbidden on GET /api/v2/routing/queues despite correct scopes

Trying to fetch queue list via Python SDK. Getting 403 Forbidden on GET /api/v2/routing/queues. Token has routing:queue and routing:queue:read. Checked the service account permissions in admin UI, all looks fine. Code below:

token = get_oauth_token()
api = routing_api.RoutingApi()
api.client.default_headers['Authorization'] = f'Bearer {token}'
queues = api.get_routing_queues()

Returns 403. Any ideas?