# GitLab: GitLab Duo Chat - 401 Errors

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-10-22 17:05 UTC · Resolved: 2025-10-22 22:57 UTC · Duration: 5.9 h
- Updates: 5 · Affected components: GitLab Duo
- [Vendor status page: https://status.gitlab.com/pages/incident/5b36dc6502d06804c08349f7/68f90ebf6b0b80463f33ab4e](https://status.gitlab.com/pages/incident/5b36dc6502d06804c08349f7/68f90ebf6b0b80463f33ab4e)
- [Company: GitLab](https://rewindex.com/company/gitlab.md)

## Timeline of updates

- **investigating** 2025-10-22 17:05 UTC: We are investigating reports that some users may be receiving 401 authentication errors when using GitLab Duo Agentic chat. Updates will be provided as we learn more.
- **investigating** 2025-10-22 18:16 UTC: We are continuing to investigate the root cause behind Duo reporting authentication errors and assessing if there is impact to other services.
- **investigating** 2025-10-22 20:10 UTC: No material updates available at this time as our investigation is still in progress. Another update will be provided no later than 23:00 UTC.
- **monitoring** 2025-10-22 21:40 UTC: The errors affecting Duo Agentic chat have ceased and we are no longer seeing reports of this issue. We were unable to identify a definitive root cause, but deployed changes to improve monitoring. We will continue to monitor closely for the next hour before fully resolving this incident.
- **resolved** 2025-10-22 22:57 UTC: After a period of monitoring we have seen no recurrence of the issue and consider the incident resolved.


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Canonical: https://rewindex.com/company/gitlab/incidents/68f90ebf6b0b80463f33ab4e · Markdown: https://rewindex.com/company/gitlab/incidents/68f90ebf6b0b80463f33ab4e.md · JSON: https://rewindex.com/api/v1/companies/gitlab/incidents/68f90ebf6b0b80463f33ab4e · Generated 2026-10-18T09:34:55.737Z