The DEMO version only includes 4 pages:
http://posthaven.com
http://posthaven.com/anotherdesignplatform-or-two.html
http://posthaven.com/designing-for-trust-in-an-ai-first-world-google-design-breakfast.html
http://posthaven.com/d-and-ad-new-blood-and-new-designers-2017.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
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