Vercel Error Code Reference
“You’re not just debugging — you’re building civic observability with global reach.”
Tip: To debug efficiently, check Vercel's Logs tab → filter by
Function, Status, and look for 500 class errors. Guard functions with try/catch and check payload sizes. Application Errors
| Error Code | Category | Status |
|---|---|---|
| BODY_NOT_A_STRING_FROM_FUNCTION | Function | 502 |
| DEPLOYMENT_BLOCKED | Deployment | 403 |
| DEPLOYMENT_DELETED | Deployment | 410 |
| DEPLOYMENT_DISABLED | Deployment | 402 |
| DEPLOYMENT_NOT_FOUND | Deployment | 404 |
| DNS_HOSTNAME_RESOLVE_FAILED | DNS | 502 |
| EDGE_FUNCTION_INVOCATION_FAILED | Function | 500 |
| FUNCTION_INVOCATION_TIMEOUT | Function | 504 |
| FUNCTION_PAYLOAD_TOO_LARGE | Function | 413 |
| INFINITE_LOOP_DETECTED | Runtime | 508 |
| INVALID_REQUEST_METHOD | Request | 405 |
| REQUEST_HEADER_TOO_LARGE | Request | 431 |
| ROUTER_CANNOT_MATCH | Routing | 502 |
| URL_TOO_LONG | Request | 414 |
Platform Errors
| Error Code | Scope | Status |
|---|---|---|
| INTERNAL_CACHE_ERROR | Internal | 500 |
| INTERNAL_DEPLOYMENT_FETCH_FAILED | Internal | 500 |
| INTERNAL_FUNCTION_NOT_FOUND | Internal | 500 |
| INTERNAL_UNEXPECTED_ERROR | Internal | 500 |
Need Help? Contact Vercel Support if you encounter any internal error codes or deployment bugs beyond app-level debugging.
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