Invalid configuration object. Webpack has been initialized using a configuration object that does not match the API schema.?

Question

webpack

mistake

[webpack-cli] Invalid configuration object. Webpack has been initialized using a configuration object that does not match the API schema.
 - configuration.module.rules[1] should be one of these:
   ["..." | object { compiler?, dependency?, descriptionData?, enforce?, exclude?, generator?, include?, issuer?, loader?, mimetype?, oneOf?, options?, parser?, realResource?, resolve?, resource?, resourceFragment?, resourceQuery?, rules?, sideEffects?, test?, type?, use? }, ...]
   -> A rule.
   Details:
    * configuration.module.rules[1].loader should be a non-empty string.
      -> A loader request.
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! [email protected] start: `webpack`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Elchin\AppData\Roaming\npm-cache\_logs\2020-12-20T20_25_05_371Z-debug.log

webpack.config.js

const path = require('path')
const {CleanWebpackPlugin} = require('clean-webpack-plugin')
const HTMLWebpackPlugin = require('html-webpack-plugin')
const CopyPlugin = require('copy-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')

const isProd = process.env.NODE_ENV === 'production'
const isDev = !isProd

const filename = ext => isDev ? `bundle.${ext}` : `bundle.[hash].${ext}`

const jsLoaders = () => {
  const loaders = [
    {
      loader: 'babel-loader',
      options: {
        presets: ['@babel/preset-env']
      }
    }
  ]

  if (isDev) {
    loaders.push('eslint-loader')
  }

  return loaders
}

module.exports = {
  context: path.resolve(__dirname, 'src'),
  mode: 'development',
  entry: ['@babel/polyfill', './index.js'],
  output: {
    filename: filename('js'),
    path: path.resolve(__dirname, 'dist')
  },
  resolve: {
    extensions: ['.js'],
    alias: {
      '@': path.resolve(__dirname, 'src'),
      '@core': path.resolve(__dirname, 'src/core')
    }
  },
  devtool: isDev ? 'source-map' : false,
  devServer: {
    port: 3000,
    hot: isDev
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HTMLWebpackPlugin({
      template: 'index.html',
      minify: {
        removeComments: isProd,
        collapseWhitespace: isProd
      }
    }),
    new CopyPlugin([
      {
        from: path.resolve(__dirname, 'src/favicon.ico'),
        to: path.resolve(__dirname, 'dist')
      }
    ]),
    new MiniCssExtractPlugin({
      filename: filename('css')
    })
  ],
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              hmr: isDev,
              reloadAll: true
            }
          },
          'css-loader',
          'sass-loader'
        ],
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: jsLoaders()
      }
    ]
  }
}

package json

{
  "name": "excel",
  "version": "1.0.0",
  "description": "",
  "main": "webpack.config.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "webpack",
    "build": "webpack --mode production"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/velikiybaron/excel.git"
  },
  "keywords": [
    "js",
    "javascript",
    "excel"
  ],
  "author": "elchin",
  "license": "ISC",
  "bugs": {
    "url": "https://github.com/velikiybaron/excel/issues"
  },
  "homepage": "https://github.com/velikiybaron/excel#readme",
  "private": true,
  "browserslist": "> 0.25%, not dead",
  "devDependencies": {
    "@babel/core": "^7.12.10",
    "@babel/preset-env": "^7.12.11",
    "babel-loader": "^8.2.2",
    "clean-webpack-plugin": "^3.0.0",
    "copy-webpack-plugin": "^7.0.0",
    "css-loader": "^5.0.1",
    "html-webpack-plugin": "^4.5.0",
    "mini-css-extract-plugin": "^1.3.3",
    "node-sass": "^5.0.0",
    "sass-loader": "^10.1.0",
    "webpack": "^5.11.0",
    "webpack-cli": "^4.2.0"
  }
}