# Klaviyo: Critical incident: Login and page loading issues

**Summary:** Klaviyo reported a critical incident preventing some customers from logging in or loading app pages, starting 2026-10-08 15:00 UTC and resolved at 2026-10-08 16:13 UTC (reported duration: 1 h 12 min). A fix restored access; campaign and flow sending were not impacted, and customers logged out during the incident may need to log in again. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-10-08 15:00 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/3xgjjsvycgjn](https://stspg.io/3xgjjsvycgjn)
- [Company: Klaviyo](https://rewindex.com/company/klaviyo.md)
- Versions: before (none: first archived) → after incident\_version:249/md2rzk68vrxg@ade33a0a48f5
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Login and page loading issues
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-10-08 15:00 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-10-08 16:13 UTC
```

**6. Added: Affected components**

```diff
+ Klaviyo App, Platform - Klaviyo App
```

**7. Added: Update** (investigating) · 2026-10-08 15:00 UTC

```diff
+ We are investigating reports that some customers are unable to log in to Klaviyo or are seeing pages load slowly or not at all. Our team is actively working to restore normal access. We will share another update as soon as we have more information.
```

**8. Added: Update** (investigating) · 2026-10-08 15:29 UTC

```diff
+ We are continuing to investigate issues preventing some customers from logging in to Klaviyo or loading pages in the app. We have not seen any impact to campaign or flow sending. We will share another update as soon as we have more information.
```

**9. Added: Update** (identified) · 2026-10-08 15:49 UTC

```diff
+ The issue has been identified and a fix is being implemented.
```

**10. Added: Update** (monitoring) · 2026-10-08 16:06 UTC

```diff
+ A fix has been deployed, and customers should now be able to log in to Klaviyo and load pages normally. If you were logged out during this incident, you may need to log in again. We continue to monitor closely and appreciate your patience throughout this incident.
```

**11. Added: Update** (resolved) · 2026-10-08 16:13 UTC

```diff
+ Customers can now log in to Klaviyo and load pages normally, and the system remains stable. This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-08 15:00 UTC | Critical incident: Login and page loading issues (this change) | outage |

All Klaviyo changes: [timeline](https://rewindex.com/company/klaviyo/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/id5e64de5e3c908 · Markdown: https://rewindex.com/change/id5e64de5e3c908.md · JSON: https://rewindex.com/api/v1/changes/id5e64de5e3c908 · Generated 2026-10-18T00:58:18.701Z