Increased Function Invocation Errors - ERR_MODULE_NOT_FOUND
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Increased Function Invocation Errors - ERR_MODULE_NOT_FOUND Vercel hosts deployments, serverless functions, edge middleware, and the dashboard used to ship frontend and full-stack apps.
resolved · 18 May 2026, 23:52 UTC
This incident has been resolved. Some deployments created between May 18, 2026, 06:15 PM - 10:16 PM UTC may have experienced increased ERR_MODULE_NOT_FOUND function invocation errors due to a bad rollout. Deployments created outside of this window are unaffected. The fix is being rolled out to existing deployments retrospectively and is expected to finish in the next few hours.
monitoring · 18 May 2026, 22:19 UTC
We are continuing to monitor for any further issues.
monitoring · 18 May 2026, 22:16 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.
identified · 18 May 2026, 22:11 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.
identified · 18 May 2026, 21:53 UTC
The issue has been identified and a fix is being implemented.
investigating · 18 May 2026, 21:42 UTC
We're investigating an issue where customers are currently experiencing application failures due to function invocation errors when using React Router 7.
5
Related incidents
2h 9m
This incident
2h 15m
Avg. resolution time
Faster
vs. average
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