Unable to Publish Power BI Report to SharePoint Online

[Fairfield]

I am attemting to create a proof of concept Power BI report, published in our SharePoint Online tennant site, as described in this post : http://ppm4all.com/2016/02/04/publish-power-bi-report-to-sharepoint-online/.

The only (slight) variance from this article is that I am attempting to use a wiki page on a publishing site.

So, I get the <iframe> code provided by the Power BI web app and attempt to insert it as instructed, but instead of seeing my report, the link to Power BI attempts to load the report but fails, returning a message "The content is not available" and a link to "Learn more about Power BI"

Has anyone had success in achieving this?