Vercel / Deployment

Vercel Runtime 500: clientReferenceManifest undefined for server-only pages in Next.js 15.5.18

Fix Vercel production 500 error caused by missing clientReferenceManifest in Next.js server components Includes evidence for Vercel troubleshooting demand.

Source-backed Last updated May 16, 2026 1 source Needs local verification

Category: Deployment
Error signature: Runtime 500: clientReferenceManifest undefined for server-only pages
Quick fix: Verify the model name, local service connectivity, and network access before retrying the model pull.
Updated: May 16, 2026
Verification status: Source-backed
Evidence: 1 public source URL

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for Vercel, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

What this error means

Runtime 500: clientReferenceManifest undefined for server-only pages is a Vercel failure pattern reported for developers trying to fix vercel production 500 error caused by missing clientreferencemanifest in next.js server components. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Reported on vercel/next.js #93862. Production-only runtime error where clientReferenceManifest is undefined for server-only pages in Next.js 15.5.18 on Vercel. Blocks production deployments for付费 users.

Common causes

Reported on vercel/next.js #93862. Production-only runtime error where clientReferenceManifest is undefined for server-only pages in Next.js 15.5.18 on Vercel. Blocks production deployments for付费 users.

Quick fixes

Confirm the exact error signature matches Runtime 500: clientReferenceManifest undefined for server-only pages.
Check the Vercel account, local tool state, and provider configuration involved in the failing workflow.
Verify the model name, local service connectivity, and network access before retrying the model pull.

Platform/tool-specific checks

Verify the command, editor, extension, or API client that produced the error.
Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

Capture the exact error message and the command, editor action, or request that triggered it.
Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
Review the source evidence below and compare it with your environment.
Apply one change at a time and rerun the smallest failing action.
Keep the working fix documented for the team or deployment environment.

How to prevent it

Keep provider/tool configuration documented.
Record non-secret diagnostics such as tool version, provider name, model name, and command path.
Add a lightweight check before CI or production workflows depend on the tool.

Diagnostic flow for this page

Match Runtime 500: clientReferenceManifest undefined for server-only pages exactly before applying the quick fix.
Compare the failing environment with Vercel versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does Runtime 500: clientReferenceManifest undefined for server-only pages mean in Vercel?

Runtime 500: clientReferenceManifest undefined for server-only pages indicates the workflow described by "Vercel Runtime 500: clientReferenceManifest undefined for server-only pages in Next.js 15.5.18" failed in a Deployment context. Start by confirming the exact signature and the component that emitted it.

What should I check first for Runtime 500: clientReferenceManifest undefined for server-only pages?

Check whether this cause matches your environment: Reported on vercel/next.js #93862. Production-only runtime error where clientReferenceManifest is undefined for server-only pages in Next.js 15.5.18 on Vercel. Blocks production deployments for付费 users.

Is the Runtime 500: clientReferenceManifest undefined for server-only pages guidance source-backed?

The "Vercel Runtime 500: clientReferenceManifest undefined for server-only pages in Next.js 15.5.18" page is labeled source-backed. It has 1 public source URL from github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for Runtime 500: clientReferenceManifest undefined for server-only pages?

For "Vercel Runtime 500: clientReferenceManifest undefined for server-only pages in Next.js 15.5.18", avoid applying "Verify the model name, local service connectivity, and network access before retrying the model pull." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging Runtime 500: clientReferenceManifest undefined for server-only pages?

For "Vercel Runtime 500: clientReferenceManifest undefined for server-only pages in Next.js 15.5.18", collect the failing Vercel command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.