Start the React project and report the following error:

[ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
    at validateString (internal/validators.js:120:11)......

There are two possible reasons for this error. The solution is as follows:
The React – Scripts version may be too low. The solution is as follows:

   1. In package.json, replace "react-scripts": "^3.3.0" with
   "react-scripts": "^3.4.0"
   2. Delete the node_modules folder
   3. Run cnpm i for a second

2. Modify the config/webpackDevServer. Config. Js file, as follows:
Look at the config/webpackDevServer. Config. Js files have the following code:

       app.use(noopServiceWorkerMiddleware());

Modified into

app.use(noopServiceWorkerMiddleware('/'));

Done!