Fatal error: Uncaught Error: Call to undefined function add_action() in C:\xampp\htdocs\joco\wp-includes\build\pages\font-library\page.php:317 Stack trace: #0 C:\xampp\htdocs\joco\wp-includes\build\pages.php(9): require_once() #1 {main} thrown in C:\xampp\htdocs\joco\wp-includes\build\pages\font-library\page.php on line 317