NPM run dev 报错 'cross-env' is not recognized as an internal or external command,

[[[[[[@](https://learnku.com/users/29000)](https://learnku.com/users/27102)](https://learnku.com/users/25661)](https://learnku.com/users/19319)](https://learnku.com/users/10240)](https://learnku.com/users/8907) development E:\65game\mygit\mytutorial
cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js

'cross-env' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [[[[[[@](https://learnku.com/users/29000)](https://learnku.com/users/27102)](https://learnku.com/users/25661)](https://learnku.com/users/19319)](https://learnku.com/users/10240)](https://learnku.com/users/8907) development: cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [[[[[[@](https://learnku.com/users/29000)](https://learnku.com/users/27102)](https://learnku.com/users/25661)](https://learnku.com/users/19319)](https://learnku.com/users/10240)](https://learnku.com/users/8907) development script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Administrator\AppData\Roaming\npm-cache_logs\2018-10-03T12_19_31_749Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [[[[[[@](https://learnku.com/users/29000)](https://learnku.com/users/27102)](https://learnku.com/users/25661)](https://learnku.com/users/19319)](https://learnku.com/users/10240)](https://learnku.com/users/8907) dev: npm run development
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [[[[[[@](https://learnku.com/users/29000)](https://learnku.com/users/27102)](https://learnku.com/users/25661)](https://learnku.com/users/19319)](https://learnku.com/users/10240)](https://learnku.com/users/8907) dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Administrator\AppData\Roaming\npm-cache_logs\2018-10-03T12_19_31_783Z-debug.log