Free version plugin yit request quote form woocommerce

Greetings.
Free version plugin yit request quote form woocommerce.
This plugin does not work with php version 8.0.13 and has problems when sending a request.
Please check and fix the problem in the next version.
thank you.

error_log : PHP Fatal error: Uncaught Error: Call to undefined function get_product_subtotal() in public_html/wp-content/plugins/yith-woocommerce-request-a-quote/templates/emails/request-quote.php:59

code : <td scope=”col” style=”text-align:left;”><?php echo wp_kses_post( WC()->cart->get_product_subtotal( $_product, $item[‘quantity’] ) ); ?></td>