webpack config js error ketika " npm run watch " dilaravel

> @ watch /var/www/html/laravel-chat > node node_modules/cross-env/dist/bin/cross-env.js NODE_ENV=development node_modules/webpack/bin/webpack.js --w atch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js

/var/www/html/laravel-chat/node_modules/laravel-mix/setup/webpack.config.js:24 let WebpackConfig = require('../src/builder/WebpackConfig'); ^^^