Some older graphcool articles do not work:
Where did you find this link?
To be honest I am not sure but it actually happens a lot to me. There are many links on the internet that point to articles that do not exists anymore. That can be quite frustrating to people who are starting out with graphcool. I am not sure what is causing it but it would be cool to at least show text like:
this article is no longer available white screen looks like
500 to me and that is not good.