安装webpack-dev-server报错这样的怎么解决呀？

C:\Users\Administrator\Desktop\WebpackVue-demo2>npm install --save-dev webpack-dev-server

npm ERR! Unexpected end of JSON input while parsing near '...2rWjgi\nkOT9gmhR/sZA2'

npm ERR! A complete log of this run can be found in:

npm ERR!     C:\Users\Administrator\AppData\Roaming\npm-cache\_logs\2019-07-20T03_07_02_862Z-debug.log