Turbopack Error: Erişim engellendi. (os error 5)

[SEVKET210]

Turbopack version: 23c46498
Next.js version: 0.0.0

Error message:

Erişim engellendi. (os error 5)

[JNEWSP]

"Erişim engellendi" means “Access is denied” – this is coming from the OS, not directly from Turbopack. os error 5 is a permissions issue when Turbopack tries to read/write some file or directory.

A few things you can try:

1. Check where your project is located

   • If the project is inside a synced / special folder like OneDrive, Desktop, Documents, Downloads, network drive, etc., try moving it to a simple local path, e.g.:
     • C:\Users\<your-user>\projects\my-app (Windows)
   • Make sure your user has full read/write permissions on that folder.

2. Check for read‑only / locked files

   • Verify the project folder and files are not read‑only.
   • Close any tools that might be locking files there (backup tools, file sync, editors, etc.).

3. Antivirus / Windows Defender

   • Sometimes antivirus or Defender blocks write access to some paths.
   • Add your project folder as an exception in your antivirus / Windows Defender and try again.

4. Clean Turbopack / Next.js cache and reinstall deps

   On macOS / Linux:

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

   On Windows (PowerShell):

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

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

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

   • OS and version (e.g. Windows 10/11 + build)
   • Node.js version
   • Exact command you are running
   • The full Turbopack log including any file paths it says it cannot access

With that information it’s easier to see exactly which path is failing and whether this is a permissions / OneDrive / antivirus issue.

[nextjs-bot]

This discussion appears to be a duplicate of #87414.

Please follow the discussion there: #87414

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