s2-auto-login MU plugin causing white screen

I am trying to use the s2-auto-login code to automatically login new signups. However, it is causing the white screen in the admin panel.

1. I have created a MU plugins folder inside wpcontent: https://screencast.com/t/kWZregCbmqWH

2. I have set the file permissions correctly: https://screencast.com/t/siUTczVr

3. I created a php file with the code recommended and inserted into the folder. https://screencast.com/t/PnRbtZ27Ky73

The code is

<?php
    add_action('ws_plugin__s2member_during_configure_user_registration', 's2_auto_login_after_registration');
    function s2_auto_login_after_registration($vars = array())
    {
    if(is_admin()) return; // Not when an Admin is creating accounts.
    wp_set_auth_cookie($vars['user_id'], FALSE, FALSE); // Log the user in.
    if(did_action('login_form_register')) // For <code>/wp-login.php?action=register</code> compatibility.
    c_ws_plugin__s2member_login_redirects::login_redirect($vars['login'], $vars['user']);
    $GLOBALS['_s2_auto_login_after_registration_vars'] = $vars; // For Pro Form compatibility.
    add_action('template_redirect', '_s2_auto_login_after_registration', 1);
    }
    function _s2_auto_login_after_registration() // Pro Form redirection handler.
    {
    $vars = $GLOBALS['_s2_auto_login_after_registration_vars'];
    c_ws_plugin__s2member_login_redirects::login_redirect($vars['login'], $vars['user']);
    }

Unfortunately, this causes the white screen in admin panel.

Any thoughts.

https://www.ads-software.com/plugins/s2member/