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CodeSandbox "Could Not Find Dependency" Error

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Workaround available Web Updated November 14, 2026Based on 2 user reportsHow we research

Quick answer

This error means the browser bundler cannot resolve a package or its relative import. Check the package name and version in package.json, or move to a VM Sandbox for Node-heavy projects.

Most likely fix: Fix the dependency list

How to fix it

Try these in order — the most common fix is first.

  1. 1. Fix the dependency list

    1. Open the Dependencies panel and add the missing package
    2. Match versions of related packages (for example react and react-dom)
    3. Reload the preview
    Did this fix it?

  2. 2. Switch to a VM Sandbox

    1. For Node-dependent or unusual packages, create a VM Sandbox where npm install runs in a real environment
    Did this fix it?

Symptoms

The preview shows DependencyNotFoundError or "Could not find module in path" for a package such as @babel/runtime or react-dom/client.

Why it happens

  • Package missing or misspelled in package.json
  • Version mismatch between packages
  • A package the browser bundler cannot handle

This guide also covers

  • codesandbox could not find dependency
  • codesandbox cannot find module
  • codesandbox dependency error

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