Turbopack Error: Access is denied. (os error 5)

[collins993]

Turbopack version: 23c46498
Next.js version: 0.0.0

Error message:

Access is denied. (os error 5)

[MahdiJDS]

Access is denied. (os error 5) on Windows is usually related to filesystem permissions, locked files, or antivirus/security interference rather than Turbopack itself.

A few things worth checking:

• Run the terminal/editor as Administrator

• Delete:

  • .next
  • node_modules
  • lockfile (package-lock.json / pnpm-lock.yaml / yarn.lock)
    and reinstall dependencies

• Make sure no other process is locking files

  • VSCode TypeScript server
  • another Next.js instance
  • antivirus scanner
  • indexing tools

• Check if the project is inside a protected directory such as:

  • C:\Program Files
  • synced cloud folders
  • restricted corporate directories

• The reported Next.js version (0.0.0) also looks suspicious and may indicate:

  • corrupted install
  • mismatched dependency resolution
  • or an incomplete build state

It may also help to test:

next dev --no-turbo

If the issue disappears without Turbopack, that would help isolate whether the problem is specifically related to Turbopack filesystem watching/caching on Windows.

Could you also share:

• Windows version
• package manager
• exact command being run
• and the full stack trace/output?

That would make it easier to narrow down.