Turbopack Error: Failed to write app endpoint /admin/friends/page

[KroemBroskoy]

Turbopack version: 23c46498
Next.js version: 0.0.0

Error message:

Turbopack Error: Failed to write app endpoint /admin/friends/page

[JNEWSP]

This error usually means Turbopack’s internal app‑router tree for /admin/friends/page is out of sync with the files on disk (missing/renamed files, invalid route structure, or a corrupted cache), not that the route itself is necessarily wrong.

A few things you can check:

1. Verify your App Router structure for this route

   Make sure you are using the app directory and that the path really exists as directories:

   app/
     admin/
       friends/
         page.tsx   // or page.jsx
         layout.tsx // optional
   

   And that app/admin/friends/page.tsx has a default export, e.g.:

   export default function FriendsPage() {
     return <div>Friends page</div>;
   }

   If you recently renamed/moved these folders while the dev server was running, stop it and start again.

2. Look for invalid or leftover segments

   • Remove any empty folders or old files under app/admin/friends that no longer belong to the route.
   • Check for things like route.ts, layout.tsx, template.tsx, etc. that might reference files which were deleted.

3. Clear Turbopack / Next.js caches and restart

   From the project root:

   macOS / Linux

   rm -rf .next .turbo
   npm install
   npm run dev -- --turbo

   Windows (PowerShell)

   Remove-Item -Recurse -Force .next, .turbo
   npm install
   npm run dev -- --turbo

   (Use yarn / pnpm if that’s what you normally use.)

4. If it still fails, could you share more details?

   • The tree of your app directory around admin/friends (e.g. output of tree app -L 3)
   • Your Next.js version and next.config.js
   • Whether this happens on a fresh create-next-app project with a minimal app/admin/friends/page.tsx

With that information it’s easier to see whether this is just a bad cache / route setup or a reproducible bug in Turbopack.