Warning: Undefined variable $use_custom_zone_list in C:\xampp\htdocs\pages\zones\zone.php on line 7

Fatal error: Uncaught Error: Call to undefined function get_field_result() in C:\xampp\htdocs\pages\zones\zone.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\pages\zones\zone.php on line 15