FB Registration not working

Trying to use the socail-connect plugin along with the Classifieds theme. Seem to have everything entered in the facebook section correctly, got the App key and secret, the Facebook app has the correct URL and is active and has Facebook Login API set, not seeing any errors on the Facebook side. When the user attempt to register they get the expected Facebook prompt and enter their Facebook password, the popup then goes away and nothing happens, no error, no registration email and no user created in the system. Manual registrations work fine.

No errors visible anywhere and nothing in the apache log.

Site details
Multi-site
Latest version of social-connect plugin and wordpress.
Classifieds theme
Sendgrid as the mailer

Using Microsoft edge