When I run npm start, I see the error.

I've tried this but didn't work: <https://techoverflow.net/2019/04/01/how-to-fix-npm-err-missing-script-start/>

{
 "private": true,
 "scripts": {
 "dev": "npm run development",
 "development": "cross-env NODE\_ENV=development node\_modules/webpack/bin/webpack.js --progress --hide-modules --config=node\_modules/laravel-mix/setup/webpack.config.js",
 "watch": "cross-env NODE\_ENV=development node\_modules/webpack/bin/webpack.js --watch --progress --hide-modules --config=node\_modules/laravel-mix/setup/webpack.config.js",
 "watch-poll": "npm run watch -- --watch-poll",
 "hot": "cross-env NODE\_ENV=development node\_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node\_modules/laravel-mix/setup/webpack.config.js",
 "prod": "npm run production",
 "production": "cross-env NODE\_ENV=production node\_modules/webpack/bin/webpack.js --no-progress --hide-modules --config=node\_modules/laravel-mix/setup/webpack.config.js"
 },
 "devDependencies": {
 "axios": "^0.17.1",
 "babel-plugin-syntax-dynamic-import": "^6.18.0",
 "babel-plugin-transform-class-properties": "^6.24.1",
 "babel-preset-react": "^6.23.0",
 "bootstrap-sass": "^3.3.7",
 "cross-env": "^5.2.0",
 "jquery": "^3.2",
 "laravel-mix": "^1.0",
 "lodash": "^4.17.11",
 "react": "^16.5.1",
 "react-dom": "^16.4.0"
 },
 "dependencies": {
 "antd": "^3.12.4",
 "babel-plugin-import": "^1.8.0",
 "css-loader": "^2.1.0",
 "less": "^3.9.0",
 "less-loader": "^4.1.0",
 "moment": "^2.22.2",
 "moment-timezone": "^0.5.21",
 "react-addons-update": "^15.6.2",
 "react-redux": "^5.0.7",
 "react-responsive-modal": "^4.0.1",
 "react-router-dom": "^4.3.1",
 "redux": "^4.0.0",
 "redux-thunk": "^2.3.0",
 "style-loader": "^0.23.1"
 }
}