npm run dev 运行报错

iview-admin@2.0.0 dev D:\phpStudy\WWW\svn\demo\iview-admin
vue-cli-service serve --open

'vue-cli-service' 不是内部或外部命令，也不是可运行的程序
或批处理文件。
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! iview-admin@2.0.0 dev: `vue-cli-service serve --open`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the iview-admin@2.0.0 dev script.
npm ERR! This is probably not a problem with npm. There is likely additional log
ging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Administrator\AppData\Roaming\npm-cache\_logs\2018-08-22T0
2_49_31_937Z-debug.log

Start with the npm run dev entry point and reproduce the reported Windows error in the repository. Check whether the Vue CLI service required by the command is installed and available, then confirm that the development server starts without the reported command-not-found failure.

Written by the indexing model from the issue text.