Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/infopask/public_html/chocodou_new/wp-content/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-register.php:12 Stack trace: #0 /home/infopask/public_html/chocodou_new/wp-content/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-register.php(37): WOOCCM_Fields_Register->__construct() #1 /home/infopask/public_html/chocodou_new/wp-content/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-register.php(101): WOOCCM_Fields_Register::instance() #2 {main} thrown in /home/infopask/public_html/chocodou_new/wp-content/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-register.php on line 12