An error of type E_ERROR was caused in line 189

Hi,

I am being given this error:

Error Details
=============
An error of type E_ERROR was caused in line 189 of the file /home/psglozxy/public_html/wp-content/plugins/yith-woocommerce-social-login/includes/class-yith-social-login.php. Error message: Uncaught Error: Call to a member function authenticate() on null in /home/psglozxy/public_html/wp-content/plugins/yith-woocommerce-social-login/includes/class-yith-social-login.php:189
Stack trace:
#0 /home/psglozxy/public_html/wp-includes/class-wp-hook.php(286): YITH_WC_Social_Login->get_login_request(”)
#1 /home/psglozxy/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /home/psglozxy/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /home/psglozxy/public_html/wp-settings.php(525): do_action(‘init’)
#4 /home/psglozxy/public_html/wp-config.php(95): require_once(‘/home/psglozxy/…’)
#5 /home/psglozxy/public_html/wp-load.php(37): require_once(‘/home/psglozxy/…’)
#6 /home/psglozxy/public_html/wp-login.php(12): require(‘/home/psglozxy/…’)
#7 {main}
thrown

We are using the latest WordPress release and PHP 7.2

Thanks