Prerender error React Origin: On your device Last updated 15 Oct 2026

Error occurred prerendering page "/x". Read more: https://nextjs.org/docs/messages/prerender-error

A page threw an error while Next.js was rendering it at build time.

Exact message you may see Error occurred prerendering page
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Seen on: React

Meaning

next build renders static pages; any exception (undefined data, failing fetch, browser APIs during SSR) fails the build. The real error is printed above.

Common causes

  • Data fetch failing during build (API unreachable from CI)
  • Accessing window/localStorage during render
  • Undefined props/params at build time

⚡ Quick fix

  1. Read the error above the prerender message
  2. Guard browser APIs with useEffect
  3. Make the page dynamic if it needs runtime data
  4. Provide env vars in the build environment

Detailed fix by platform

React

  1. Run next build --debug for more detail

How to diagnose

  1. Error — What is printed above?
  2. Data — Is the API reachable during build?

🔧 Still not fixed?

Many errors look alike. If the steps above didn’t solve it, one of these is probably what you’re facing:

Where this error sits

Origin: On your device. Errors that are often confused with or caused by this one (click to open):

async Client Component — Error: async/await is not yet supported in Client Components, only Server Components. (React)async Client ComponentCan't resolve 'fs' — Module not found: Can't resolve 'fs' (Next.js / webpack 5) (React)Can't resolve 'fs'Dynamic server usage — Error: Dynamic server usage: Route /x couldn't be rendered statically because it used `cookies` (React)Dynamic server usageFunctions cannot be passed — Error: Functions cannot be passed directly to Client Components unless you explicitly expose it by marking it with "use server". (React)Functions cannot be p…Hydration failed — Error: Hydration failed because the initial UI does not match what was rendered on the server (React)Hydration failedlookup registry-1.docker.io: no such host — dial tcp: lookup registry-1.docker.io: no such host / Temporary failure in name resolution during docker build (Docker)lookup registry-1.doc…Module parse failed — Module parse failed: Unexpected token. You may need an appropriate loader to handle this file type (React)Module parse failedMSB3027 — error MSB3027: Could not copy "obj\...\App.dll" to "bin\...\App.dll". Exceeded retry count of 10. The file is locked by: "App (1234)" (.NET)MSB3027Prerender…

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