Turbopack Error: failed to create whole tree

[Starlord786]

Turbopack version: 23c46498
Next.js version: 0.0.0

Error message:

failed to create whole tree

[JNEWSP]

This message is a generic top‑level Turbopack failure – it usually means something earlier in the log failed (module not found, invalid route, FS permission issue, etc.), and Turbopack then reports “failed to create whole tree”.

A few things you can try and some info that would help debug:

1. Look for the real error above this message

   • In the terminal where you ran next dev --turbo, scroll up and look for the first error line (e.g. Module not found, Cannot read property ..., filesystem error, etc.).
   • That earlier error is usually the root cause.

2. Clear Turbopack / Next.js caches and restart

   rm -rf .next .turbo
   npm install        # or yarn / pnpm
   npm run dev -- --turbo

3. Check your project setup

   • Make sure you’re running the dev server from the folder that contains your package.json.
   • Confirm next, react, and react-dom are installed under "dependencies" in package.json.
   • If you’re using the app directory, verify that your route structure has at least:

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

4. Please share some extra details if it still happens

   • OS + version
   • Node.js version
   • next version from package.json
   • The full error output, especially the first error line above failed to create whole tree
   • Whether this is a fresh create-next-app project or part of a monorepo

With that info it’s much easier to see why the tree creation fails and whether this is a Turbopack bug or a configuration/runtime error.

[nextjs-bot]

This discussion appears to be a duplicate of #87039.

Please follow the discussion there: #87039

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