Error 20000423 appears when a customer tries to activate a version of the product which was released after the activation code expired. This means that the support period for the licenses associated with the activation code has expired.
​Customers can verify the details of the activation code by logging into the License portal with the registered e-mail ID (Used while buying the license) and activation code. Following this, customers can reach out to 42Gears Sales Team for license renewal.