Get SKU to output on Wishlist

I’m using YITH wishlist with Woocommerce. I want to have my wishlist display the SKU as well as the default items.

I was able to get the YITH plugin to show an option of “Show SKU” in the settings.

I can’t figure out how to call up the SKU for output though.

Here is the code I have:

// Custom wishlist categories
                        <?php if( get_option( 'yith_wcwl_stock_number_show' ) == 'yes' ) : ?>
                            <td class="product-stock-number">
                                <?php
                                    echo $_product->get_sku();
                                ?>
                            </td>
                        <?php endif ?>

It produces the following error:

Fatal error: Call to a member function get_sku() on a non-object in /home2/cityrank/public_html/wp-content/plugins/yith-woocommerce-wishlist/templates/wishlist.php on line 145

I tried adding global $product; to the top of the page but that didn’t work either.

Thanks!

https://www.ads-software.com/plugins/woocommerce/