Always Online - How do I actually view the cached page?

I see this page quite frequently, informing me that I can view a cached version thanks to Cloudflare’s Always Online. Sounds great, except I can’t figure out how to actually view the cached version

This page only shows up if your website is offline or Cloudflare cannot reach the server for some reason.

Cloudflare automatically cache your CSS, images and html for display this screen. If you cannot see anything except this message, maybe Cloudflare cannot cache your website because of your configuration. Sometime ago I did a bad html code which doesnt allowed Cloudflare to cache right my website and I had the same problem, when I changed my whole template this was fixed, I still not sure what happened.