Node.js can'；t在windows 10上安装node express

我正在尝试在windows 10上设置node express开发环境。我已成功安装node.js和npm，但当我尝试使用以下方式安装express时：

npm init
npm install express

我得到以下错误：

npm WARN myapp@1.0.0 No description
npm WARN myapp@1.0.0 No repository field.

npm ERR! code ENOENT
npm ERR! syscall rename
npm ERR! path C:\Users\mi292519\Dropbox\selfLearning\nodeJs\myapp\node_modules\bytes
npm ERR! dest C:\Users\mi292519\Dropbox\selfLearning\nodeJs\myapp\node_modules\.bytes.DELETE
npm ERR! errno -4058
npm ERR! enoent ENOENT: no such file or directory, rename 'C:\Users\mi292519\Dropbox\selfLearning\nodeJs\myapp\node_modules\bytes' -> 'C:\Users\mi292519\Dropbox\selfLearning\nodeJs\myapp\node_modules\.bytes.DELETE'
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\mi292519\AppData\Roaming\npm-cache\_logs\2020-10-07T11_17_07_099Z-debug.log

我尝试删除node_模块和package.json，还尝试再次删除npm缓存和npm安装，但都不起作用

任何帮助都将不胜感激

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谢谢

什么是错误信息？@Michael:请把错误日志复制到这里。对不起，我已经把错误信息包括进来了。这有关系吗？您是否尝试过在dropbox文件夹之外执行此操作？