Hello. I have the same issue. The solution posted from our friend from SNAP does not work due to the changes in FB policy and enabling the “Use Strict Mode for Redirect URIs” by default and even when you create new app (as proposed in SNAP instructions) it remains enabled. I guess that if the support post sample url (e.g. https://www.yoursite.com/someotherpath&someotherstuff=1) and we enter this exact URL in the Facebook “Valid OAuth Redirect URIs” field the plugin will work again…
