vue-cli-serve启动报错

报错信息:

> vue-cli-service serve

 INFO  Starting development server...

10% building 2/2 modules 0 active ERROR  TypeError: Cannot read property 'upgrade' of undefined

TypeError: Cannot read property 'upgrade' of undefined

    at Server.<anonymous> (D:\company\unifound\newgit\vue-admin-template\node_modules\_webpack-dev-server@3.11.2@webpack-dev-server\lib\Server.js:135:47)

    at Array.forEach (<anonymous>)

    at new Server (D:\company\unifound\newgit\vue-admin-template\node_modules\_webpack-dev-server@3.11.2@webpack-dev-server\lib\Server.js:134:27)

    at serve (D:\company\unifound\newgit\vue-admin-template\node_modules\_@vue_cli-service@4.4.4@@vue\cli-service\lib\commands\serve.js:172:20)

    at processTicksAndRejections (internal/process/task_queues.js:97:5)

npm ERR! code ELIFECYCLE

npm ERR! errno 1

npm ERR! vue-admin-template@4.4.0 dev: `vue-cli-service serve`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the vue-admin-template@4.4.0 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!     D:\Program Files\node-v12.18.3-win-x64\node_cache\_logs\2021-01-27T03_17_30_205Z-debug.log

原因是vue的配置文件vue.config.js中devServer.proxy地址没写

巴特西

vue-cli-serve启动报错

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