rsnext/errors/prerender-error.mdx

---
title: Prerender Error
---

## Why This Error Occurred

While prerendering a page an error occurred. This can occur for many reasons from adding non-pages e.g. `components` to your `pages` folder or expecting props to be populated which are not.

## Possible Ways to Fix It

- Make sure to move any non-pages out of the `pages` folder
- Check for any code that assumes a prop is available, even when it might not be
- Set default values for all dynamic pages' props (avoid `undefined`, use `null` instead so it can be serialized)
- Check for any out of date modules that you might be relying on
- Make sure your component handles `fallback` if it is enabled in `getStaticPaths`. [Fallback docs](/docs/pages/api-reference/functions/get-static-paths#fallback-false)
- Make sure you are not trying to export (`output: 'export'` or `next export`) pages that have server-side rendering enabled [`getServerSideProps`](/docs/pages/building-your-application/data-fetching/get-server-side-props)
docs: Migrate error messages to MDX and App Router. (#52038) This PR is part of a larger effort to migrate error messages to MDX and use App Router: https://github.com/vercel/front/pull/23459 2023-07-05 15:11:16 +02:00			`---`
			`title: Prerender Error`
			`---`
[WIP] Add err.sh for prerender error (#9548) 2019-11-27 10:54:57 +01:00
docs: Migrate error messages to MDX and App Router. (#52038) This PR is part of a larger effort to migrate error messages to MDX and use App Router: https://github.com/vercel/front/pull/23459 2023-07-05 15:11:16 +02:00			`## Why This Error Occurred`
[WIP] Add err.sh for prerender error (#9548) 2019-11-27 10:54:57 +01:00
			While prerendering a page an error occurred. This can occur for many reasons from adding non-pages e.g. `components` to your `pages` folder or expecting props to be populated which are not.

docs: Migrate error messages to MDX and App Router. (#52038) This PR is part of a larger effort to migrate error messages to MDX and use App Router: https://github.com/vercel/front/pull/23459 2023-07-05 15:11:16 +02:00			`## Possible Ways to Fix It`
[WIP] Add err.sh for prerender error (#9548) 2019-11-27 10:54:57 +01:00
			- Make sure to move any non-pages out of the `pages` folder
Update docs for Prerender Error message (#30044) Update docs to mention `undefined` doesn't work, use `null` instead 2021-10-18 22:49:34 +02:00			`- Check for any code that assumes a prop is available, even when it might not be`
			- Set default values for all dynamic pages' props (avoid `undefined`, use `null` instead so it can be serialized)
[WIP] Add err.sh for prerender error (#9548) 2019-11-27 10:54:57 +01:00			`- Check for any out of date modules that you might be relying on`
docs: Migrate error messages to MDX and App Router. (#52038) This PR is part of a larger effort to migrate error messages to MDX and use App Router: https://github.com/vercel/front/pull/23459 2023-07-05 15:11:16 +02:00			- Make sure your component handles `fallback` if it is enabled in `getStaticPaths`. [Fallback docs](/docs/pages/api-reference/functions/get-static-paths#fallback-false)
			- Make sure you are not trying to export (`output: 'export'` or `next export`) pages that have server-side rendering enabled [`getServerSideProps`](/docs/pages/building-your-application/data-fetching/get-server-side-props)