FOX - Currency Switcher Professional for WooCommerce

Plugin URL: https://wordpress.org/plugins/wc-multivendor-marketplace/

• in  file  wp-content/plugins/wc-multivendor-marketplace\core\class-wcfmmp-commission.php add next code:

  if (class_exists('WOOCS')) {
      global $WOOCS;
      $_order_currency = get_post_meta($order_id, '_order_currency', true);
      $order_rate = get_post_meta($order_id, '_woocs_order_rate', true);
      $currencies = $WOOCS->get_currencies();
      if (!$order_rate) {
          if (isset($currencies[$_order_currency])) {
              $order_rate = $currencies[$_order_currency]['rate'];
          }
      }
      if ($order_rate) {
          $commission_amount = $WOOCS->back_convert($commission_amount, $order_rate, 2);
      }
  }