I'm integrating Facebook with my app by following this link, everything works fine until I try to login via Facebook.
Then I'm keep on getting this error
This is my Facebook app setup:
I've tried several different ways of changing the app domain by following several tutorials.
I've tried:
localhost
localhost:3000
and none seems to be working.
You should try setting up a facebook login product. Then under settings place localhost:3000/users/auth/facebook/callback under Valid OAuth redirect URIs. That's what got it for me.