Troubleshooting zero price products not adding to cart
After applying the 8.2.0 update, you may observe that some products cannot be added to the shopping cart.
This behavior is observed in products with a recurring price of
Please apply the 8.2.1 Maintenance Release via the Utilities > Update WHMCS page.
Adjust the product's recurring price to
0.01 or change the Payment Type option from Recurring to Free.
A hotfix has been created for 8.2.0 only to correct this behaviour: