vue2 配置vue.config.js devServer 时报错

 配置vue.config.js devServer 后，启用项目报错。

报错信息：

ERROR ValidationError: Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.
- options has an unknown property 'overlay'. These properties are valid:
object { allowedHosts?, bonjour?, client?, compress?, devMiddleware?, headers?, historyApiFallback?, host?, hot?, http2?, https?, ipc?, liveReload?, magicHtml?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, server?, setupExitSignals?, setupMiddlewares?, static?, watchFiles?, webSocketServer? }
ValidationError: Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.
- options has an unknown property 'overlay'. These properties are valid:
object { allowedHosts?, bonjour?, client?, compress?, devMiddleware?, headers?, historyApiFallback?, host?, hot?, http2?, https?, ipc?, liveReload?, magicHtml?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, server?, setupExitSignals?, setupMiddlewares?, static?, watchFiles?, webSocketServer? }
at validate (G:\stevenchen\LDProject\ldadminvue\node_modules\webpack-dev-server\node_modules\schema-utils\dist\validate.js:115:11)
at new Server (G:\stevenchen\LDProject\ldadminvue\node_modules\webpack-dev-server\lib\Server.js:231:5)
at serve (G:\stevenchen\LDProject\ldadminvue\node_modules\@vue\cli-service\lib\commands\serve.js:194:20)
at processTicksAndRejections (node:internal/process/task_queues:96:5)

----------vue.config.js 代码如下---------------------------------------------------------------------------------------

import config from 'src/config/index'

module.exports = {

    devServer: {

        host: 'localhost',

        port: 8080,

        open: true,

        /*

        overlay: {

            warnings: false,

            errors: true

        },

        */

        proxy: {

            '/api': {

                target: config.BASE_URL,

                ws: true,

                changOrigin: true,

                pathRewrite: {

                    '^/api': '' // 思路是如果是开发环境，就给所有要代理的接口统一加上前缀，然后代理请求时再统一通过rewrite去掉

                }

            }

        }

    }

}

----------------------------------------

我的处理方法，注释掉这一段，就OK了

 /*

        overlay: {

            warnings: false,

            errors: true

        },

        */