Trying to figure out what caused this issue when using the Supreme Directory Child Theme:
After looking into the error logs the theme supreme-directory was being referenced. After switching to the default 2017 theme we were able to login.
Here is the fatal error referencing the theme:
[17-Aug-2018 02:35:58 UTC] PHP Fatal error: Uncaught Error: Call to undefined function geodir_user_signup() in /home/s352/html/wp-content/themes/supreme-directory/inc/geodirectory-compatibility.php:444
Stack trace:
#0 /home/s352/html/wp-includes/class-wp-hook.php(286): sd_header_login_handler(”)
#1 /home/s352/html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /home/s352/html/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#3 /home/s352/html/wp-settings.php(450): do_action(‘init’)
#4 /home/s352/html/wp-config.php(77): require_once(‘/home/s352/html…’)
#5 /home/s352/html/wp-load.php(37): require_once(‘/home/s352/html…’)
#6 /home/s352/html/wp-login.php(12): require(‘/home/s352/html…’)
#7 {main}
thrown in /home/s352/html/wp-content/themes/supreme-directory/inc/geodirectory-compatibility.php on line 444