Need Help

Hello my friends, there is a problem we need help, I use myCRED point woocommerce buy goods at a time of statements Fatal error: Call to undefined function wc_get_order () in / home / smvsmco1 / public_html / wp-content /plugins/mycred/addons/gateway/carts/mycred-woocommerce.php on line 251 of this issue, how can I do to fix it?

https://wordpress.org/plugins/mycred/