一个404错误=未找到（ HTTPS ：//en.wikipedia.org/wiki/HTTP_404 ）

A 404 Error = Not Found (https://en.wikipedia.org/wiki/HTTP_404)

所以，可能你的网址错误的任何资源，您试图访问，或者一些其他问题的连接。

So probably you have the url wrong for whatever resource you are trying to access, or else some other problem with your connection.

事实上 - 如果我尝试手动从我的浏览器我转到 https://graph.facebook.com 得到一个404错误。

Indeed - if I manually try to navigate to https://graph.facebook.com from my browser I get a 404 error.

由于这是使用https协议，它可以是一个身份验证问题了。

Since this is using an https protocol, it could be an authentication issue too.