Template not shown on FB canvas

Your site has all of the stylesheets (CSS files) hard-coded to load over non-https. In the Facebook canvas area, all content should be loaded over https or else it will not load at all. You can see the same behavior by going directly to your page over a secure connection:
www.zero-stress-zone.com/en

You should contact your template provider to update all links to stylesheets to use relative or scheme-less (no http:// or https://) links.

I hope that helps explain, but if you need anything else, just let us know.

Thanks,
Alex

It wouldn't be Cloudflare. They don't cache the HTML output of the page, just images and other media. If you're having the same problem with other templates, it likely means you have the System - Page Cache plugin enabled (or some other page caching extension). You should disable that.

I hope that helps,
Alex

Awesome! I'm glad to hear that got you going. If you need anything else from us, just let us know.

Finally, if you haven't already, please consider leaving a rating and review for JFBConnect, or our support, on the Joomla Extension Directory. It's certainly not required, but very appreciate:
extensions.joomla.org/extensions/extensi...l-display/jfbconnect

Thanks,
Alex