Fatal error: Uncaught Error: Call to undefined function add_action() in /home/regeneremoda/public_html/wp-content/plugins/checkout-fees-for-woocommerce/checkout-block/checkout-blocks-initialize.php:16 Stack trace: #0 {main} thrown in /home/regeneremoda/public_html/wp-content/plugins/checkout-fees-for-woocommerce/checkout-block/checkout-blocks-initialize.php on line 16