[Plugin: Simple Facebook Connect] Connect/Login problems

Hi,
I have tried in the post but I found no solution.

I installed sfc but can not login with facebook.

I see the button in the sidebar is that in the comment box.
When I click “Connect with Facebook” open the pop-up on facebook where I enter username and password, then the window closes and the page of the site makes no refresh.

The site (besport.org/sport) has a number of subdomains or type tennis.besport.org golf.besport.org with a htaccess rule that refers to “sport”.besport.org/sports/index.php.

I set in the application of facebook:
site url: https://besport.org/sport/
site domain: besport.org

The site can be tested with this post
https://tennis.besport.org/senza-categoria/nadal-torna-fra-un-mese/

Thank you in advance for the help.

https://www.ads-software.com/extend/plugins/simple-facebook-connect/