How to fix the TypeError [ERR_INVALID_ARG_TYPE]: The path argument must be of type string
In this tutorial, we are going to learn about how to fix the TypeError [ERR_INVALID_ARG_TYPE]: The “path” argument must be of type string. Received type undefined raised when starting the react app.
When we run an npm start or yarn start command in our project, the following error is sometimes printed in our terminal.
TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined
at validateString (internal/validators.js:125:11)
at Object.resolve (path.js:161:7)
at resolveApp (E:\Apps\react-app\orders\config\paths.js:10:41)
at Object.<anonymous> (E:\Apps\react-app\orders\config\paths.js:73:13)
at Module._compile (internal/modules/cjs/loader.js:776:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Module.require (internal/modules/cjs/loader.js:690:17)
npm ERR! code ELIFECYCLE
npm ERR! errno 1This error occurs if we are using the old version of the react-scripts package in our project, to fix this error follow the below steps.
- First, remove the
node_modulesfolder inside your project directory using the below command.
rm-rf node_modulesor you can remove it manually by right-clicking on it and select the delete option.
- Update the
react-scriptversion to the latest.
npm install react-scripts@latest
# for yarn
yarn install react-scripts@latest-
Re-install the node modules again by running the
npm installcommand. -
Now, start the project using the below command.
npm start

