Fatal error: Uncaught Error: Call to undefined function get_user_by() in /home/customer/www/surf-shape.com/public_html/wp-includes/meta.php:1651 Stack trace: #0 /home/customer/www/surf-shape.com/public_html/wp-includes/meta.php(176): get_object_subtype('user', 1) #1 /home/customer/www/surf-shape.com/public_html/wp-includes/user.php(863): update_metadata('user', 1, 'show_welcome_sc...', 1, '') #2 /home/customer/www/surf-shape.com/public_html/wp-content/install.php(33): update_user_meta(1, 'show_welcome_sc...', 1) #3 /home/customer/www/surf-shape.com/public_html/wp-admin/includes/upgrade.php(13): require('/home/customer/...') #4 /home/customer/www/surf-shape.com/public_html/wp-content/plugins/mailchimp-wp/includes/eoi-subscribers.php(161): require_once('/home/customer/...') #5 /home/customer/www/surf-shape.com/public_html/wp-content/plugins/mailchimp-wp/includes/eoi-subscribers.php(444): EoiSubscribers->__construct() #6 /home/customer/www/surf-shape.com/public_html/wp-content/plugins/mailchimp-wp/mailchimp-wp.php(45): requi in /home/customer/www/surf-shape.com/public_html/wp-includes/meta.php on line 1651