I cannot get any global add-ons to add to cart. I can select any global add-on and the cost increase is reflected on the product page, however; once I click “add to cart”, the cost of the add-on is no longer reflected in my cart. The description of the product in the cart does not reflect the add-on either.
I have WC version 2.3.8. Some research lead me to a fix that suggested to delete the template file (/woocommerce/single-product/add-to-cart/variable.php) so that WooCommerce will use the new bundled template file. I don’t have a variable.php file on the server, at least not in that folder. The only file in that folder is simple.php.
All this is assuming Variable Products is the same as what WooCommerce is calling “Global Add-ons”.