Plugin not tested with latest woocommerce version, its return given below error.
[15-Dec-2017 11:34:49 UTC] PHP Fatal error: Call to undefined method WC_Gateway_WooCommerce_POLi::get_id() in /home/methclearco/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php on line 1392
