Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-conditional.php:11 Stack trace: #0 /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-conditional.php(20): WOOCCM_Fields_Conditional->__construct() #1 /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-conditional.php(79): WOOCCM_Fields_Conditional::instance() #2 {main} thrown in /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-conditional.php on line 11