How do you handle an unfamiliar error without abandoning the user?

You are authorized for Tier 1 read-only checks on a Windows 11 laptop using Microsoft Edge. An internal asset-tracking application shows “Request failed — 409.” Two employees first reported it at 10:10. The service dashboard has no posted incident, and the approved knowledge base has no matching article. The Tier 1 guide requires escalation of an unrecognized repeatable application error after documenting it. You cannot modify application data, clear shared records, or use administrator credentials. The application support queue owns these faults.