Vercel incident
Increased Function Invocation Errors - ERR_MODULE_NOT_FOUND
Resolved after 2 hours 9 minutes, affecting Edge Functions, on May 18, 2026.
We are continuing to monitor for any further issues.
Affected components
Update timeline
- investigating May 18, 2026, 09:42 PM UTC
We're investigating an issue where customers are currently experiencing application failures due to function invocation errors when using React Router 7.
- identified May 18, 2026, 09:53 PM UTC
The issue has been identified and a fix is being implemented.
- identified May 18, 2026, 10:11 PM UTC
We're continuing to work on rolling out a fix. In the mean time, customers may use Instant Rollback to a previous deployment version as an immediate workaround in order to recover.
- monitoring May 18, 2026, 10:16 PM UTC
A fix is rolled out for the function invocation errors affecting React Router 7 deployments. To recover, redeploy your application or use Instant Rollback to a previous deployment from the dashboard. We're continuing to monitor.
- monitoring May 18, 2026, 10:19 PM UTC
We are continuing to monitor for any further issues.
- resolved May 18, 2026, 11:52 PM UTC
This incident has been resolved.
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