Then a second error:
This email notifies you of errors which occurred within asynchronous processing of a workflow that you own. For more information about these types of emails, please refer to the following page in Help Center: SuiteFlow (Workflow) > Testing and Troubleshooting Workflows > Viewing Workflow Activity > Error Handling for Scheduled Workflows.
Workflow: *NSI - Customer Dunning WF Scheduler
Errors on Records:
Internal ID : 5125 - id