Provider
VercelIncident detail
Increased Function Invocation Errors - ERR_MODULE_NOT_FOUND
Resolved incidentMinor
Timeline window
to
Outage alerts
Get alerted the next time Vercel breaks
Free email alerts for up to 5 providers. No card, live in about a minute. Paid plans add Slack, Teams, Discord, and webhook delivery across your whole stack, plus higher API quotas.
Timeline
Incident updates
Every update Vercel posted, oldest to newest, exactly as it appeared on their official status page.
Investigating
We're investigating an issue where customers are currently experiencing application failures due to function invocation errors when using React Router 7.
Identified
The issue has been identified and a fix is being implemented.
Identified
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
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
We are continuing to monitor for any further issues.
Resolved
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.
Keep exploring
More from Vercel
Neighboring incidents on Vercel's timeline and the rest of their record on OutageDeck.