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-filters.php:303 Stack trace: #0 /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-filters.php(11): WOOCCM_Fields_Filter->init() #1 /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-filters.php(17): WOOCCM_Fields_Filter->__construct() #2 /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-filters.php(316): WOOCCM_Fields_Filter::instance() #3 {main} thrown in /home/infopask/public_html/chocodou/goblok-lu-wan/plugins/woocommerce-checkout-manager/includes/view/frontend/class-wooccm-fields-filters.php on line 303