A web page is not displayed when embedded into Dashboard

Issue

Some web pages (for example https://www.google.co.jp/) when embedded into Dashboard on Jasperreports Server are simply not displayed

Possible cause and solution

The page you are trying to embed does not display because of this error: 

Refused to display 'https://www.google.co.jp/' in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'. 

You should be able to see this error in your browser console. This is configured on the website of the 'https://www.google.co.jp/' to prevent the page from being embedded into third party pages. It's not something you can control from within Jasperreports Server. 

There is some useful information on 'X-Frame-Options' and this issue in particular in the following thread: 

http://security.stackexchange.com/questions/67889/why-do-browsers-enforce-the-same-origin-security-policy-on-iframes