rsnext/errors/next-response-next-in-app-route-handler.mdx
Michael Novotny fe797c1074
Updates Mozilla links to not include language preference (#55326)
Internal suggestion to remove `en-US` from Mozilla urls since MDN is
available in multiple languages nowadays it will automatically redirect
to the viewer’s language preference.

Closes
[DX-2076](https://linear.app/vercel/issue/DX-2076/make-external-mozilla-links-language-agnostic-in-nextjs-docs)
2023-09-13 11:06:29 -05:00

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---
title: '`NextResponse.next()` used in a App Route Handler'
---
## Why This Error Occurred
App Route Handler's do not currently support using the `NextResponse.next()` method to forward to the next middleware because the handler is considered the endpoint to the middleware chain. Handlers must always return a `Response` object instead.
## Possible Ways to Fix It
Remove the `NextResponse.next()` and replace it with a correct response handler.
## Useful Links
- [`Response`](https://developer.mozilla.org/docs/Web/API/Response)
- [`NextResponse`](/docs/pages/api-reference/functions/next-server#nextresponse)