No admin data found at root webpage

I’ve installed this plugin in an attempt to resolve the occasional difficulties I have linking FB to my website pages. But I’m struggling to get it working. If I go to the FB insights page, I get the following message:

No admin data found at root webpage http://peeblesbaptistchurch.org/. Insights requires admin data at this root webpage for the specified URL http://peeblesbaptistchurch.org/

As far as I can see, the plugin has added my FB ids correctly (I’ve tried using both numerical and text based IDs – doesn’t seem to make a difference). What am I doing wrong?

Cheers,

Ian

https://wordpress.org/plugins/wonderm00ns-simple-facebook-open-graph-tags/