Hi, I have been fighting with this for the last ten hours. I am a newbie with both WP and FB App. But I can usually follow direction well. I have spent way more time on setting up this plug in than I wanted.
According to instructions:
In the app settings page, fill in the field "Website with Facebook Login Site URL" to:
This section is not in the settings page.
I found this answer.
find the section Website with Facebook Login in "Select how your app integrates with Facebook" block, then fill the Site URL field with the url https://www.addthis.com/secure/ssi_callback
I have sent the last 5 hours looking for the sections on
Select how your app integrates with Facebook"
and the field "Website with FB Login"
... with no luck
Every other how to blog, video, or tutorial is outdated due to the new updated developer page in FB.
Any help would be Very appreciated