模块构建失败（来自./node_modules/babel-preset-react/lib/index.js）

Question

当我尝试使用Webpack 4和Babel 7启动我的React应用程序时，错误弹出。

Error: Plugin/Preset files are not allowed to export objects, only functions. In C:\Users\Yifeng\reactApp\node_modules\babel-preset-react\lib\index.js
    at createDescriptor (C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:178:11)
    at C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:109:50
    at Array.map (<anonymous>)
    at createDescriptors (C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:109:29)
    at createPresetDescriptors (C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:101:10)
    at C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:58:96
    at cachedFunction (C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\caching.js:32:19)
    at presets (C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:29:84)
    at mergeChainOpts (C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\config-chain.js:320:26)
    at C:\Users\Yifeng\reactApp\node_modules\@babel\core\lib\config\config-chain.js:283:7

我在网上查找了此错误的其他情况，并发现了https://github.com/babel/babel/issues/6808，但是在我添加了@babel/preset-env和@babel/preset-react之后，问题仍然存在。

package.json

`

{
      "name": "firefly",
      "version": "1.0.0",
      "description": "a simple mobile app",
      "main": "index.js",
      "scripts": {
        "start": "webpack-dev-server --mode development --open --hot",
        "build": "webpack --mode production"
      },
      "keywords": [
        "firefly"
      ],
      "author": "Yifeng Lin",
      "license": "ISC",
      "dependencies": {
        "core-js": "^3.5.0",
        "react": "^16.12.0",
        "react-dom": "^16.12.0",
        "webpack": "^4.41.3",
        "webpack-cli": "^3.3.10",
        "webpack-dev-server": "^3.10.0"
      },
      "devDependencies": {
        "@babel/core": "^7.7.5",
        "@babel/preset-env": "^7.7.6",
        "@babel/preset-react": "^7.7.4",
        "babel-loader": "^8.0.6",
        "html-webpack-plugin": "^3.2.0"
      },
      "repository": {
        "type": "",
        "url": ""
      },
      "bugs": {
        "url": ""
      },
      "homepage": ""
    }