There are two IDs. "{YOUR_FACEBOOK_USER_ID}" is different from "{YOUR_APPLICATION_ID}". I recommend using both these IDs in OG meta tags as follows:

HTML Code:
<meta property="fb:admins" content="{YOUR_FACEBOOK_USER_ID}"/>
<meta property="fb:app_id" content="{YOUR_APPLICATION_ID}"/>
To find out your fb:admins, simply direct your browser to http://graph.facebook.com/yourusername

To find out your fb:app_id, simply direct your browser to https://developers.facebook.com/apps when you are logged in. Then click on the button "Edit App"

Please use the correct IDs as above... this error message will go away..

Regards