npm run dev时报错

npm ERR! code ENOENT
npm ERR! syscall open
npm ERR! path C:\Users\...\Desktop\...系统\package.json
npm ERR! errno -4058
npm ERR! enoent ENOENT: no such file or directory, open 'C:\Users\MZSH\Desktop\时间同步网络系统\package.json'
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\MZSH\AppData\Roaming\npm-cache\_logs\2021-04-25T09_08_13_206Z-debug.log

这是因为在压缩项目文件夹，然后在解压时多了一层与项目名称相同文件夹，所以你现在打开的是项目得上一级文件夹。
解决办法：从当前文件再进入，找到要打开得项目文件，重新编译即可。