error on facebook app

Your Facebook Application doesn't have to be setup in the App Center for Open Graph Actions to work. They are separate things altogether. I can test the preview you link you posted, since that's not public until Facebook approves it.

Either way though, the Canvas URL doesn't affect Open Graph Actions. They are separate things altogether and you don't need SSL even for Open Graph Actions. You do need SSL for Canvas views and Requests though.

So, I'm not sure what's wrong with the App Center page. When I tried to go to your Canvas page, it did show your site, but there was a "403 - You've got to ask yourself one question: " message on the page that was shown. So, that may be where the issue is.. Facebook is seeing a 403 error and simply not loading the page. Check that you don't have any redirection or SEF extensions enabled (for testing) and that the URL you set for your Canvas Home Page doesn't perform any login redirects or anything else that may cause problems.

Hope that helps,
Alex

Awesome. Glad to hear you got that going. The App Center is pretty selective on things. If you don't get approved for inclusion, don't take that badly. It won't affect your app's functionality in any way. The more your app gets used and the more actions that are published (without being marked as spam) the better the chances of it eventually being included in the public directory.

Best of luck,
Alex