latbabs

this is the error I am getting using the wpcargo plugin, any help?

atal error: Uncaught Error: Call to undefined function cache_users() in /home/shabrddk/stjexpress.com/wp-includes/class-wp-user-query.php:843 Stack trace: #0 /home/shabrddk/stjexpress.com/wp-includes/class-wp-user-query.php(79): WP_User_Query->query() #1 /home/shabrddk/stjexpress.com/wp-includes/user.php(763): WP_User_Query->__construct(Array) #2 /home/shabrddk/stjexpress.com/wp-content/plugins/wpcargo--/admin/classes/class-wpcargo.php(321): get_users(Array) #3 /home/shabrddk/stjexpress.com/wp-content/plugins/wpcargo--/admin/classes/class-wpcargo.php(54): WPCargo->all_wpcargo_users() #4 /home/shabrddk/stjexpress.com/wp-content/plugins/wpcargo--/admin/classes/class-wpcargo.php(379): WPCargo->__construct() #5 /home/shabrddk/stjexpress.com/wp-content/plugins/wpcargo--/wpcargo.php(43): require_once('/home/shabrddk/...') #6 /home/shabrddk/stjexpress.com/wp-settings.php(447): include_once('/home/shabrddk/...') #7 /home/shabrddk/stjexpress.com/wp-config.php(96): require_once('/home/shabrddk/...') #8 /home/shabrddk/stjexpress.co in /home/shabrddk/stjexpress.com/wp-includes/class-wp-user-query.php on line 843