Symptom
You have configured cross-selling for a product, but the cross-sells (recommendations) do not appear on the order form page (cart.php) during the order process.
Cause
All of the products that you selected in the Cross-sells tab at Configuration > System Settings > Products/Services are hidden. Because there are no products to display, the cross-selling recommendation section does not display in the shopping cart.
Solution
To resolve this issue, you can either update the list of cross-sells for the product or disable hiding for the already-selected products.
Update the List of Cross-sells
To update the list of cross-sells for the affected product, use the Cross-sells tab at Configuration > System Settings > Products/Services.
For more information, see Cross-selling and Product Recommendations In WHMCS and How to Configure Cross-selling.
Edit the Cross-sell Products
To ensure that the already-configured cross-sells can display in the recommendations section, edit those products to disable the Hidden option.
To do this:
- Go to Configuration > System Settings > Products/Services.
- Click Edit next to the product that should display as a cross-selling recommendation.
- Uncheck Hidden.
- Click Save Changes.
