好吧，显然 Google+ 只是脑残什么的，因为解决方案只是清除我的 cookie！

Well, apparently Google+ just had a brainfart or something, because the solution was simply to clear my cookies!

我尝试在另一台计算机上使用我的网站，并且 Google+ API 运行良好(没有错误)，所以我尝试清除桌面上的 cookie，瞧，它开始工作了！

I tried using my website on another computer and the Google+ API worked fine (no errors), so I tried clearing the cookies on my desktop and lo and behold, it started working!