Node.js 抛出新的_ValidationError.default（错误、架构、配置）；并且需要webpack@^4.0.0的对等机，但未安装

我在我的项目文件夹中安装了webpack，希望通过在项目文件夹中使用cmd键入“npm run start”，在前端运行一个简单的界面进行测试。但是我收到了这个错误

我重新安装它并运行“npm安装”和“npm审计修复”，但收到警告说需要webpack的对等版本@^4.0

感觉好像是说我没有安装webpack。但我相信我有

这是package.json

    {
  "name": "app",
  "version": "1.0.0",
  "description": "",
  "private": true,
  "scripts": {
    "build": "webpack",
    "start": "webpack-dev-server"
  },
  "devDependencies": {
    "copy-webpack-plugin": "^6.3.2",
    "webpack": "^5.9.0",
    "webpack-cli": "^3.3.10",
    "webpack-dev-server": "^3.11.0"
  },
  "dependencies": {
    "web3": "^1.2.4"
  }
}

这是我的webpack.config.js

 const path = require("path");
const CopyWebpackPlugin = require("copy-webpack-plugin");

module.exports = {
  entry: "./src/index.js",
  output: {
    filename: "index.js",
    path: path.resolve(__dirname, "dist"),
  },
  plugins: [
    new CopyWebpackPlugin([{ from: "./src/index.html", to: "index.html" }]),
  ],
  devServer: { contentBase: path.join(__dirname, "dist"), compress: true },
};

让我知道我做错了什么。多谢各位