Ultimate Facebook Login/Registration Error

Whenever I try to register or login into my site using Facebook, as part of the Ultimate Facebook plugin I get an error:

https://gyazo.com/606df606b9daf3d4a8dec383af1e6d92

https://gyazo.com/ae87bf7d330e53ce2d431228af5eaeaa

All my settings in WP, and on FB look correct to me.

Thanks,

Darby