我们是服务商, 但是在调用获取客户群列表时返回 60011, no privilege to access/modify contact/party/agent, 这个该怎么办? 客户的客户群已经设置过权限了

{
    "errcode": 60011,
    "errmsg": "no privilege to access/modify contact/party/agent , hint: [], from ip: xxxxxxx, more info at https://open.work.weixin.qq.com/devtool/query?e=60011",
    "group_chat_list": []
}