# Template builds failing

- Provider: [E2B](https://down.guide/providers/e2b)
- Confidence: Confirmed
- Impact: Major outage
- lasted 0m
- started 2026-10-21 14:40 UTC
- E2B states the impact was 2026-10-21 14:03 to 14:06 UTC (3m)
- id: DWN-88607c7f5b
- Official page: https://status.e2b.dev/incidents/01M5FEGC218X1EEYP1V962EMQW

## Root cause
> This was caused by a configuration issue on our side, which has been fixed.

[Postmortem](https://status.e2b.dev/incidents/01M5FEGC218X1EEYP1V962EMQW)

## Updates from E2B
### 2026-10-21 14:03 UTC: identified
We have identified an issue causing new template builds to fail.

### 2026-10-21 14:06 UTC: resolved
Between 14:03 and 14:06 UTC on October 21, new template builds failed to start with the error “500: invalid build configuration, contact support”. 
This was caused by a configuration issue on our side, which has been fixed. Template builds are working normally again. Running sandboxes were not affected. If a build failed during this window, please retry it.
We apologize for any disruption.

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