Почему ошибка вылетает?

// @flow
/* eslint-disable react/jsx-filename-extension */
import * as React from 'react';
import ReactDOM from 'react-dom';
import { HelloWorld } from './components';
import './styles/styles';

class App extends React.PureComponent {
  render() {
    return (
      <HelloWorld />
    );
  }
}

ReactDOM.render(
  <App />,
  document.getElementById('root')
);

{
  "name": "web",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "webpack-dev-server --mode development --open --hot",
    "build": "webpack --mode production"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.3.4",
    "@babel/preset-env": "^7.3.4",
    "@babel/preset-react": "^7.0.0",
    "autoprefixer": "^9.4.10",
    "babel-eslint": "^10.0.1",
    "babel-loader": "^8.0.5",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "css-loader": "^2.1.1",
    "eslint": "^5.15.1",
    "eslint-config-airbnb": "^17.1.0",
    "eslint-import-resolver-webpack": "^0.11.0",
    "eslint-loader": "^2.1.2",
    "eslint-plugin-flowtype": "^3.4.2",
    "eslint-plugin-import": "^2.16.0",
    "eslint-plugin-jsx-a11y": "^6.2.1",
    "eslint-plugin-react": "^7.12.4",
    "html-webpack-plugin": "^3.2.0",
    "less": "^3.9.0",
    "less-loader": "^4.1.0",
    "mini-css-extract-plugin": "^0.5.0",
    "postcss-cli": "^6.1.2",
    "postcss-loader": "^3.0.0",
    "react-dev-utils": "^8.0.0",
    "style-loader": "^0.23.1",
    "webpack": "^4.29.6",
    "webpack-cli": "^3.2.3",
    "webpack-dev-server": "^3.2.1"
  },
  "dependencies": {
    "react": "^16.8.4",
    "react-dom": "^16.8.4",
    "react-redux": "^6.0.1",
    "redux": "^4.0.1"
  }
}

const HtmlWebpackPlugin = require('html-webpack-plugin');
const autoprefixer = require('autoprefixer');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const eslintFormatter = require('react-dev-utils/eslintFormatter');

const htmlWebpackPluginConfig = new HtmlWebpackPlugin({
  template: './src/index.html',
  filename: './index.html',
});

const miniCssExtractConfig = new MiniCssExtractPlugin({
  filename: '[name].[hash].css',
  chunkFilename: '[id].[hash].css',
});

module.exports = {
  entry: './src/index.js',
  output: {
    path: `${__dirname}/dist`,
    publicPath: '/',
    filename: 'main.js',
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
          },
          {
            options: {
              formatter: eslintFormatter,
              eslintPath: require.resolve('eslint'),

            },
            loader: require.resolve('eslint-loader'),
          },
        ],
      },
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              plugins: [
                autoprefixer({
                  browsers: ['> 0%'],
                }),
              ],
              sourceMap: true,
            },
          },
        ],
      },
      {
        test: /\.less$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              plugins: [
                autoprefixer({
                  browsers: ['> 0%'],
                }),
              ],
              sourceMap: true,
            },
          },
          'less-loader',
        ],
      },
    ],
  },
  resolve: {
    extensions: ['.js', '.css', '.less'],
  },
  plugins: [
    htmlWebpackPluginConfig,
    miniCssExtractConfig,
    autoprefixer,
  ],
  devServer: {
    contentBase: './dist',
  },
};