How to Fix the “TypeError [ERR_INVALID_ARG_TYPE]: The “path” argument must be of type string. Received type undefined” Error When Starting a React App?

Sometimes, we may run into the “TypeError [ERR_INVALID_ARG_TYPE]: The “path” argument must be of type string. Received type undefined” error when starting a React app.

In this article, we’ll look at how to fix the “TypeError [ERR_INVALID_ARG_TYPE]: The “path” argument must be of type string. Received type undefined” error when starting a React app.

Fix the “TypeError [ERR_INVALID_ARG_TYPE]: The “path” argument must be of type string. Received type undefined” Error When Starting a React App

To fix the “TypeError [ERR_INVALID_ARG_TYPE]: The “path” argument must be of type string. Received type undefined” error when starting a React app, we should upgrade the react-scripts package to the latest version.

To do this, we:

  1. Replace in your package.json “react-scripts”: “^3.x.x” with “react-scripts”: “^3.4.1” (or the latest available version)
    (optional for some)
  2. Delete the node_modules folder in the project.
  3. Run npm install or yarn install

This error may be caused by running npm audit fix, so avoid running this command to avoid this error.

Conclusion

To fix the “TypeError [ERR_INVALID_ARG_TYPE]: The “path” argument must be of type string. Received type undefined” error when starting a React app, we should upgrade the react-scripts package to the latest version.