Fatal error: Uncaught Error: Call to undefined function add_action() in /opt/app-root/src/wp-content/plugins/advanced-custom-fields/includes/forms/form-widget.php:40 Stack trace: #0 /opt/app-root/src/wp-content/plugins/advanced-custom-fields/includes/forms/form-widget.php(325): acf_form_widget->__construct() #1 {main} thrown in /opt/app-root/src/wp-content/plugins/advanced-custom-fields/includes/forms/form-widget.php on line 40