"article:author" meta tag not being output in html

I tried to implement the “article:author” meta tag for strollerinthecity.com, however, when I view the site’s source html, the meta tag doesn’t show up. I performed the following steps:

1. I enabled Facebook OpenGraph
2. I entered the Facebook profile URL in the appropriate field on the user profile page
3. I cleared the browser cache and the page cache

I entered the site’s URL in the Facebook’s Open Graph Debugger Tool and got the following errors:

• “Error parsing input URL, no data was cached, or no data was scraped.”
• “Critical Errors That Must Be Fixed: Error Linting URL An internal error occurred while linting the URL.”

Am I missing something?

Thanks.

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