An error occurred during one of these scenarios: while generating a license key while trying to send a notification, while processing a payment or while trying to integrate with Salesforce.
See the Error Log in the Commerce Assistant in order to find out if further action is required on your part.
The data that you receive depends on the type of error that occurs. For example, if a customer successfully pays for a product, but an error occurs during the license key generation, then cleverbridge sends an email notification with the following subject line: "[ERR] #123456789: Error creating license key for cleverbridge". However, since the transaction was successful, a PaidOrderNotification is attached.