小编Ale*_*der的帖子

我安装了所有必需的软件包并尝试运行npm start脚本，这给了我以下错误：

TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
    at validateString (internal/validators.js:118:11)
    at Object.join (path.js:375:7)
    at noopServiceWorkerMiddleware (C:\Alex\Practise\React website\front-end\node_modules\react-dev-utils\noopServiceWorkerMiddleware.js:14:26)
    at Layer.handle [as handle_request] (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\layer.js:95:5)
    at trim_prefix (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\index.js:317:13)
    at C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\index.js:284:7
    at Function.process_params (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\index.js:335:12)
    at next (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\index.js:275:10)
    at launchEditorMiddleware (C:\Alex\Practise\React website\front-end\node_modules\react-dev-utils\errorOverlayMiddleware.js:20:7)
    at Layer.handle [as handle_request] (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\layer.js:95:5)

这是我的 package.json 的副本：

{
  "name": "front-end",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^4.2.4",
    "@testing-library/react": "^9.3.2",
    "@testing-library/user-event": "^7.1.2",
    "node-sass": "^4.13.1",
    "react": "^16.12.0",
    "react-dom": …