Thanks for using my plugin!
The latest version of the plugin doesn’t support the {order_items} shortcode anymore. This shortcode used to display a list of purchased items but this functionality is not necessary now because it was replaced with a single “Review” button.
If customers click on “Review” button in the email, they will go to a page with a review form dynamically generated based on their order. They will be able to review all the products from the order on one page and then submit this form. It helps to increase the number of reviews because customers don’t need to visit an individual page of each product from their order (like they had to do in the previous version of the plugin).
Does it answer your question?