Receiving an email from NetSuite Alerts with subject line 'Workflow Failure...' is by design. This behavior provides notification where and when did an error occur.
1. Name of the Workflow is in Email Subject. Open the Workflow in NetSuite; this way you can find the record type what the Workflow is deployed on.
2. The ID of the record is in the Email Body. It is referring to record's internal id where the issue was encountered. Open the record in NetSuite and navigate to System Information tab > Workflow > Workflow History > Log.
3. The Email body also contains a short description about the cause of the error. (i.e. You do not have permissions to edit this transaction.)
4. Check the Log and change the Workflow settings according to your needs.