To note, I have been through the full process of adding the correct URLs into the 'Valid OAuth redirect URIs' field but facebook will not accept the http version of the URL as directed to be added. I've tried adding a mixture of all of these but non…
not sure if it helps but this is the URL its trying to load at the time -
https://web.facebook.com/dialog/oauth?client_id=260253897685353&redirect_uri=https://londonsvenskar.api.oneall.com/socialize/callback.html&state=a8c54ac3-ba09-4410-…