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-handler.php:12 Stack trace: #0 /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-handler.php(42): WOOCCM_Fields_Handler->__construct() #1 /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-handler.php(284): WOOCCM_Fields_Handler::instance() #2 {main} thrown in /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-handler.php on line 12