Export Functionality not working.

Hello,

I had an issue with the export not working trying to export 5 orders. Since I am a developer, I looked at the error. In your file /wc-customer-source/includes/wccs-admin-export.php where you are calling the get_billing_first_name() on the order. It errors on a refunded or failed order. This is because a refunded order is not a WC_Order. I added a check to make sure that the order you are exporting is a WC_Order and if not to get the parent order.

I added four lines to your code after the foreach begins: Line 64 or so.

            //In cases where the order is actually a refund or failed then the billing last name is not set. You must get the parent order.
            if ( ! is_a( $order, 'WC_Order' ) ) {
                $order = new WC_Order(  $order->get_parent_id() );
            }

This will get the parent order if the order is not a valid WC Order. Please implement this fix in the next version. We were able to export over 100 orders after this fix.

Thank you.