I think this may be caused by the restriction on third party cookies.
The redirect to the cookie article is caused by the security system described here:
In short, the system checks to make sure both cookies and Javascript are enabled.
Some browsers block access to so-called “third party cookies”, which are cookies set through things like iframes. This is done as these cookies may be used to track you across websites. In general, browsers are moving towards always blocking these cookies.
So, long story short: you can’t iframe your site hosted here.