无法从Facebook社交评论插件中获取评论

Question

我正在尝试从Facebook社交评论插件中获取评论，但它显示

{
   "error": {
      "message": "An access token is required to request this resource.",
      "type": "OAuthException",
      "code": 104,
      "fbtrace_id": "CY152jKURX4"
   }
}

我用它

https://graph.facebook.com/comments?id=http://umar.com?access_token=我的access_token

我也试过

https://graph.facebook.com/comments?id=http%3A%2F%2Fumar.com?access_token=我的access_token

但它仍无法正常工作