If I set any defaults for OpenGraph tags in the defaults box in the config section for my site, when I use the facebook linter on an article I get the error:
"You failed to provide a valid list of administrators. You need to supply the administrators using either a "fb:app_id" meta tag or a "fb:admins" meta tag to specify a comma-delimited list of Facebook users."
If the defaults box is left blank, I don't get this error.
Sample URL:
www.music-scene.biz/index.php/component/...62-events-management
Defaults set to:
type=company
site_name=Music Scene