Fatal error: Uncaught Error: Call to undefined function register_activation_hook() in /home/romeston/prueba.idelive.com/wp-content/plugins/insert-headers-and-footers/includes/class-wpcode-install.php:17 Stack trace: #0 /home/romeston/prueba.idelive.com/wp-content/plugins/insert-headers-and-footers/includes/class-wpcode-install.php(111): WPCode_Install->__construct() #1 {main} thrown in /home/romeston/prueba.idelive.com/wp-content/plugins/insert-headers-and-footers/includes/class-wpcode-install.php on line 17