报错信息如下：
Module build failed: Error: ENOENT: no such file or directory, scandir 'D:\renren-fast-vue\node_modules\node-sass\vendor'
at Object.fs.readdirSync (fs.js:904:18)
at Object.getInstalledBinaries (D:\renren-fast-vue\node_modules\node-sass\lib\extensions.js:132:13)
at foundBinariesList (D:\renren-fast-vue\node_modules\node-sass\lib\errors.js:20:15)
at foundBinaries (D:\renren-fast-vue\node_modules\node-sass\lib\errors.js:15:5)
at Object.<anonymous> (D:\renren-fast-vue\node_modules\node-sass\lib\index.js:14:35)
at Module._compile (module.js:653:30)
at Object.Module._extensions..js (module.js:664:10)
at Module.load (module.js:566:32)
at tryModuleLoad (module.js:506:12)
at Function.Module._load (module.js:498:3)
at Module.require (module.js:597:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (D:\renren-fast-vue\node_modules\sass-loader\lib\loader.js:3:14)
at Module._compile (module.js:653:30)
解决方法如下：
重新执行 npm rebuild node-sass
最后解决启动成功：
