CopyWebpackPlugin - TypeError：无法读取未定义的属性“thisCompilation”

如何解决CopyWebpackPlugin - TypeError：无法读取未定义的属性“thisCompilation”

这就是我试图让 webpack 复制项目根级别的 locales 文件夹中的 JSON 文件的方式。

  config.plugins.push(
    new copyPlugin({
      patterns: [
        {
          from: "./locales",to: "./",},],}),new webpack.DefinePlugin({
      "process.env.NODE_ENV": JSON.stringify(
        (env && env.NODE_ENV) || "production"
      ),})
  );

我收到以下错误

D:\aakashverma\BVC\hello-ps-bvc-addon\addon\src\main\assets\node_modules\webpack\bin\webpack.js:348
                        throw err;
                        ^

TypeError: Cannot read property 'thisCompilation' of undefined
    at copyPlugin.apply (D:\aakashverma\BVC\hello-ps-bvc-addon\addon\src\main\assets\node_modules\copy-webpack-plugin\dist\index.js:457:20)
    at Compiler.apply (D:\aakashverma\BVC\hello-ps-bvc-addon\addon\src\main\assets\node_modules\tapable\lib\Tapable.js:375:16)
    at webpack (D:\aakashverma\BVC\hello-ps-bvc-addon\addon\src\main\assets\node_modules\webpack\lib\webpack.js:33:19)
    at processOptions (D:\aakashverma\BVC\hello-ps-bvc-addon\addon\src\main\assets\node_modules\webpack\bin\webpack.js:335:15)
    at D:\aakashverma\BVC\hello-ps-bvc-addon\addon\src\main\assets\node_modules\webpack\bin\webpack.js:397:2
    at Object.Yargs.self.parse (D:\aakashverma\BVC\hello-ps-bvc-addon\addon\src\main\assets\node_modules\webpack\node_modules\yargs\yargs.js:533:18)
    at Object.<anonymous> (D:\aakashverma\BVC\hello-ps-bvc-addon\addon\src\main\assets\node_modules\webpack\bin\webpack.js:152:7)

我清理并重新安装了 node_modules 但仍然没有进展。

请帮忙。

编辑：在下面添加了 package.json

  "dependencies": {
    "@material-ui/core": "^4.11.1","@reduxjs/toolkit": "^1.4.0","flatted": "^3.1.0","gql-query-builder": "^3.5.0","i18next": "^19.8.4","i18next-http-backend": "^1.0.21","ps-solution-library-ui-common": "^1.7.0","react": "^16.13.1","react-dom": "^16.13.1","react-i18next": "^11.8.5","react-redux": "^7.2.1","react-resize-aware": "^2.7.2","react-router": "^5.2.0","react-router-dom": "^5.2.0","redux": "^4.0.5","redux-form": "^8.3.6","redux-form-validators": "^3.0.1"
  },"devDependencies": {
    "babel-plugin-transform-es3-member-expression-literals": "^6.22.0","babel-plugin-transform-es3-property-literals": "^6.22.0","babel-preset-es2015": "^6.24.1","babel-preset-stage-0": "^6.24.1","copyfiles": "^2.4.1","html-webpack-externals-plugin": "^3.8.0","ps-solution-library-webpack-common": "^1.0.2","uglifyjs-webpack-plugin": "^2.2.0"
  },