问create-react-app缺少文件？

EN

npm ERR! path C:\Users\Alex\AppData\Roaming\npm\node_modules\create-react-native-app\build\index.js
npm ERR! code ENOENT
npm ERR! errno -4058  
npm ERR! syscall chmod  
npm ERR! enoent ENOENT: no such file or directory, chmod 'C:\Users  \Alex\AppData\Roaming\npm\node_modules\create-react-native-app\build\index.js'  
npm ERR! enoent This is related to npm not being able to find a file.  
npm ERR! enoent  

npm ERR! A complete log of this run can be found in:  
npm ERR!     C:\Users\Alex\AppData\Roaming\npm-cache\_logs  \2018-06-26T16_24_58_412Z-debug.log