安装完脚手架，开发运行报错 about mpx HOT 9 CLOSED

function runWebpack (cfg) {
  if (program.production || program.watch) {
    cfg = merge(cfg, program.production ? {
      mode: 'production'
    } : {
      cache: true
    })
  }
  if (process.env.npm_config_report) {
    var BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
    var mainCfg = Array.isArray(cfg) ? cfg[0] : cfg
    mainCfg.plugins.push(new BundleAnalyzerPlugin())
  }
  if (program.watch) {
    【console.log(cfg)】
    webpack(cfg).watch({}, callback)
  } else {
    webpack(cfg, callback)
  }
}

{ '0':
   { module: { rules: [Array] },
     output:
      { filename: '[name].js',
        path: 'D:\\桌面-copy\\mpxtest\\dist\\plugin' },
     optimization: { runtimeChunk: [Object], splitChunks: [Object] },
     mode: 'none',
     plugins: [ [Object] ],
     resolve: { extensions: [Array], modules: [Array] },
     entry: { plugin: 'D:\\桌面-copy\\mpxtest\\src\\plugin\\plugin.json' } },
  '1':
   { module: { rules: [Array] },
     output:
      { filename: '[name].js',
        path: 'D:\\桌面-copy\\mpxtest\\dist\\miniprogram' },
     optimization: { runtimeChunk: [Object], splitChunks: [Object] },
     mode: 'none',
     plugins: [ [Object], [Object] ],
     resolve: { extensions: [Array], modules: [Array] },
     entry: { app: 'D:\\桌面-copy\\mpxtest\\src\\miniprogram\\app.mpx' } },
  cache: true }

 cfg = merge(cfg, program.production ? {
      mode: 'production'
    } : {
      cache: true
    })