Board Thread:Support Requests - Getting Technical/@comment-13372324-20150603145520/@comment-24409505-20150603194824

Libro wrote: And another problem, it is not showing anything. It just shows a plain white screen.

I assume you are using the Countdown script from here. It looks like you only copied the HTML code into the page, but didn't add the javascript code in your MediaWiki:Common.js.