npm run server报错

$ npm run dev

> lufei@1.0.0 dev E:\pythonProject\luffy\luffyvue
> webpack-dev-server --inline --progress --config build/webpack.dev.conf.js

 10% building modules 0/1 modules 1 active ... webpack/hot/dev-server ./src/main 10% building modules 1/2
 modules 1 active ...ode_modules\webpack\hot\dev-server 10% building modules 2/3 modules 1 active 
...honProject\luffy\luffyvue\src\main 12% building modules 24/44 modules 20 active ...\element-ui\lib\theme-chalk\index.cssevents.js:174
      throw er; // Unhandled ‘error‘ event
      ^

Error: listen EADDRNOTAVAIL: address not available 12.20.22.14:8080
    at Server.setupListenHandle [as _listen2] (net.js:1260:19)
    at listenInCluster (net.js:1325:12)
    at GetAddrInfoReqWrap.doListen [as callback] (net.js:1458:7)
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:62:10)
Emitted ‘error‘ event at:
    at emitErrorNT (net.js:1304:8)
    at process._tickCallback (internal/process/next_tick.js:63:19)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! lufei@1.0.0 dev: `webpack-dev-server --inline --progress --config build/webpack.dev.conf.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the lufei@1.0.0 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!     C:\Users\14612\AppData\Roaming\npm-cache\_logs\2019-06-16T14_53_41_465Z-debug.log