安装Vue CLI3后为什么不能启动Vue UI？

Question

使用

node 10.2.0
npm 6.4.1

但是当我运行vue ui时 它返回：

localhost/:1 GET https://unpkg.com/vue-cli-locales@3.8.2/locales/zh_CN.json 404
GraphQL error: Unknown type "Project". Did you mean "Progress"?
    at new t (bundle.esm.js:63)
    at bundle.esm.js:1239
    at bundle.esm.js:1551
    at Set.forEach (<anonymous>)
    at bundle.esm.js:1549
    at Map.forEach (<anonymous>)
    at e.broadcastQueries (bundle.esm.js:1547)
    at bundle.esm.js:1638
    at Object.next (Observable.js:308)
    at b (Observable.js:130)