Outage in Vercel
React Router 7 function invocation errors
Resolved MinorIncident Report
Summary AI Generated
Vercel experienced function invocation errors affecting React Router 7 applications, causing application failures for customers using Edge Functions. The issue lasted 2.2 hours and was resolved by rolling out a fix, with customers able to recover by redeploying their applications or using Instant Rollback to previous deployments. The incident was fully resolved after a monitoring period to ensure stability.
We're investigating an issue where customers are currently experiencing application failures due to function invocation errors when using React Router 7.
Components affected
Vercel Edge FunctionsTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 1 hour ago - at 05/18/2026 11:52PM
This incident has been resolved.
MONITORING
about 3 hours ago - at 05/18/2026 10:19PM
We are continuing to monitor for any further issues.
MONITORING
about 3 hours ago - at 05/18/2026 10:16PM
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
about 3 hours ago - at 05/18/2026 10:11PM
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
about 3 hours ago - at 05/18/2026 09:53PM
The issue has been identified and a fix is being implemented.
INVESTIGATING
about 3 hours ago - at 05/18/2026 09:42PM
We're investigating an issue where customers are currently experiencing application failures due to function invocation errors when using React Router 7.
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