I'm running 4.1 and Facebook login does not work.
https://shop.lonestarcandlesandmore.com/signin-facebook is redirect URI in OAuth settings.
No error message but customer is returned to login with the following in the address bar
https://shop.lonestarcandlesandmore.com/login#_=_
API Key and Secret are correct.
It appears that Facebook sees the customer because clicking on login with Facebook comes right back to the above page until I clear the browser cache.
Any ideas or suggestions would be appreciated