I'm trying to set up a URL page as described in https://support.shotgunsoftware.com/entries/28798-URL-Pages-Tabs
Whatever type of URL I enter, intranet, external http or external https, I get the same result: nothing appears. Inspecting the HTML I see:
<iframe id="ext-gen524" src="http://www.example.com" height="100%" width="100%">
Is there maybe an admin setting I'm missing?