# Sigma Computing: Critical incident: Sigma organizations hosted on AWS US are not loading

**Summary:** A critical outage left Sigma organizations hosted on AWS US stuck on loading screens, with impact starting approximately 20:39 UTC November 08, 2023. The incident record ran from 2023-11-08 20:53 UTC to resolution at 2023-11-08 21:54 UTC (computed duration: 1 h 0 min); mitigation measures restored app loading. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2023-11-08 20:53 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/9vn4jmqx06r5](https://stspg.io/9vn4jmqx06r5)
- [Company: Sigma Computing](https://rewindex.com/company/sigma-computing.md)
- Versions: before (none: first archived) → after incident\_version:77/db5ydck3zcxy@938c0161987b
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Sigma organizations hosted on AWS US are not loading
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2023-11-08 20:53 UTC
```

**5. Added: Resolved time**

```diff
+ 2023-11-08 21:54 UTC
```

**6. Added: Affected components**

```diff
+ AWS - Sigma - AWS (US), Sigma - AWS (US)
```

**7. Added: Update** (investigating) · 2023-11-08 20:53 UTC

```diff
+ We are investigating an issue in our infrastructure causing Sigma organizations hosted on AWS US to be in a loading state. We are treating this as our highest priority. Our apologies for any inconvenience caused. Impacted Cloud Regions & Services: Sigma users hosted on AWS US User Experience: Attempting to load Sigma app shows a loading screen Incident Start Time: Approximately 20:39 UTC November 08, 2023
```

**8. Added: Update** (monitoring) · 2023-11-08 21:13 UTC

```diff
+ Our engineers have implemented mitigation measures to circumvent the issue and we are monitoring their effect closely. Impacted Cloud Regions & Services: Sigma users hosted on AWS US User Experience: Users will be able to load the Sigma app successfully Incident Start Time: Approximately 20:39 UTC November 08, 2023 Incident End Time: Approximately 20:57 UTC November 08, 2023
```

**9. Added: Update** (resolved) · 2023-11-08 21:54 UTC

```diff
+ The mitigation measures have proven effective, and the issue is resolved. We will perform a root cause analysis (RCA) and publish our findings in a postmortem note to the Sigma Community site in coming days. Impacted Cloud Regions & Services: Sigma users hosted on AWS US User Experience: Users will be able to load the Sigma app successfully Incident Start Time: Approximately 20:39 UTC November 08, 2023 Incident End Time: Approximately 20:57 UTC November 08, 2023
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2023-11-08 20:53 UTC | Critical incident: Sigma organizations hosted on AWS US are not loading (this change) | outage |

All Sigma Computing changes: [timeline](https://rewindex.com/company/sigma-computing/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i267433d28e8f36 · Markdown: https://rewindex.com/change/i267433d28e8f36.md · JSON: https://rewindex.com/api/v1/changes/i267433d28e8f36 · Generated 2026-10-18T02:31:34.778Z