我最近一直遇到这个问题，除了npm start之外，没有任何与npm相关的东西对我有效。

NPM安装出现此错误:

$ npm install @material-ui/core
npm ERR! Object for dependency "@babel/generator" is empty.
npm ERR! Something went wrong. Regenerate the package-lock.json with "npm install".
npm ERR! If using a shrinkwrap, regenerate with "npm shrinkwrap".
npm ERR! A complete log of this run can be found in:
npm ERR!   C:\Users\Parth\AppData\Roaming\npm-cache\_logs\2020-08-20T13_52_13_701Z-debug.log

NPX create-react-app./出现此错误:

npx create-react-app ./
npx: installed 98 in 10.023s

Creating a new React app in G:\hel.

Installing packages. This might take a couple of minutes. Installing
react, react-dom, and react-scripts with cra-template...

yarn add v1.22.4 [1/4] Resolving packages... [2/4] Fetching
packages... error An unexpected error occurred: "UNKNOWN: unknown
error, unlink
'C:\\Users\\Parth\\AppData\\Local\\Yarn\\Cache\\v6\\npm-core-js-pure-3.6.4-4bf1ba866e25814f149d4e9aaa08c36173506e3a-integrity\\node_modules\\core-js-pure\\features\\object\\is-frozen.js'".
info If you think this is a bug, please open a bug report with the
information provided in "G:\\hel\\yarn-error.log". info Visit
https://yarnpkg.com/en/docs/cli/add for documentation about this command.

Aborting installation.   yarnpkg add --exact react react-dom
react-scripts cra-template --cwd G:\hel has failed.

Deleting generated file... package.json Deleting generated file...
yarn.lock Done.

编辑:所以我尝试使用Yarn进行安装，但是出现了以下错误:

$ yarn add @material-ui/core
yarn add v1.22.4
warning package-lock.json found. Your project contains lock files generated by
tools other than Yarn. It is advised not to mix package managers in order to
avoid resolution inconsistencies caused by unsynchronized lock files. To clear
this warning, remove package-lock.json.
   [1/4] Resolving packages...
   [2/4] Fetching packages...
   error An unexpected error occurred: "UNKNOWN: unknown error, unlink 
'C:\\Users\\Parth\\AppData\\Local\\Yarn\\Cache\\v6\\npm-core-js-pure-3.6.4-4bf1ba866e25814f149d4e9aaa08c36173506e3a-integrity\\node_modules\\core-js-pure\\features\\object\\is-frozen.js'".
info If you think this is a bug, please open a bug report with the information
provided in "F:\\Parth\\covid-19-tracker\\yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

我该怎么解决这个问题？