The “Add This Product” link is greyed out.
Thank you for taking the time to post about this.
Is the issue that the button is greyed out only for the “Kindle” and/or “Audiobook” options (though it is enabled for “Hardcover” and “Paperback”)? I found that to be the case on this product page for example with v21 of Price Wise.
If not, can you clarify and provide the URL for a page demonstrating the problem?
While we have made some effort to update product information when different product options are selected, it is by no means working correctly everywhere. Here’s a related open issue in the repo.