我如何在cmd中运行“ npx create-react-app first-app”时解决此“ npm ERR！无法读取属性'startsWith'为null”的问题？

如何解决我如何在cmd中运行“ npx create-react-app first-app”时解决此“ npm ERR！无法读取属性'startsWith'为null”的问题？

我尝试使用npx create-react-app first-app在react js中创建一个应用程序。发生以下错误：

npm ERR！无法读取null的属性“ startsWith”

npm ERR！可以在以下位置找到此运行的完整日志：

npm ERR！ C：\ Users \ ipsee \ AppData \ Roaming \ npm-cache_logs \ 2020-10-28T04_55_26_865Z-debug.log 安装['create-react-app @ latest']失败，代码为1

.logs文件内是：

0 info it worked if it ends with ok
1 verbose cli [
1 verbose cli   'C:\\Users\\ipsee\\node.exe',1 verbose cli   'C:\\Users\\ipsee\\node_modules\\npm\\bin\\npm-cli.js',1 verbose cli   'install',1 verbose cli   'create-react-app@latest',1 verbose cli   '--global',1 verbose cli   '--prefix',1 verbose cli   'C:\\Users\\ipsee\\AppData\\Roaming\\npm-cache\\_npx\\17732',1 verbose cli   '--loglevel',1 verbose cli   'error',1 verbose cli   '--json'
1 verbose cli ]
2 info using npm@6.14.8
3 info using node@v12.19.0
4 verbose npm-session e4f12b7a8b6f8e92
5 silly install loadCurrentTree
6 silly install readGlobalPackageData
7 silly fetchPackageMetaData error for create-react-app@latest Cannot read property 'startsWith' of null
8 timing stage:rollbackFailedOptional Completed in 2ms
9 timing stage:runTopLevelLifecycles Completed in 38ms
10 verbose stack TypeError: Cannot read property 'startsWith' of null
10 verbose stack     at getProxy (C:\Users\ipsee\node_modules\npm\node_modules\make-fetch-happen\agent.js:164:25)
10 verbose stack     at getAgent (C:\Users\ipsee\node_modules\npm\node_modules\make-fetch-happen\agent.js:37:19)

10 verbose stack     at remoteFetch (C:\Users\ipsee\node_modules\npm\node_modules\make-fetch-happen\index.js:310:17)
10 verbose stack     at C:\Users\ipsee\node_modules\npm\node_modules\make-fetch-happen\index.js:172:14
10 verbose stack     at tryCatcher (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\util.js:16:23)
10 verbose stack     at Promise._settlePromiseFromHandler (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:517:31)
10 verbose stack     at Promise._settlePromise (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:574:18)
10 verbose stack     at Promise._settlePromise0 (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:619:10)
10 verbose stack     at Promise._settlePromises (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:699:18)
10 verbose stack     at Promise._fulfill (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:643:18)
10 verbose stack     at Promise._resolveCallback (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:437:57)
10 verbose stack     at Promise._settlePromiseFromHandler (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:529:17)
10 verbose stack     at Promise._settlePromise (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:574:18)
10 verbose stack     at Promise._settlePromise0 (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:619:10)
10 verbose stack     at Promise._settlePromises (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:699:18)
10 verbose stack     at Promise._fulfill (C:\Users\ipsee\node_modules\npm\node_modules\bluebird\js\release\promise.js:643:18)
11 verbose cwd C:\Users\ipsee
12 verbose Windows_NT 10.0.18362
13 verbose argv "C:\\Users\\ipsee\\node.exe" "C:\\Users\\ipsee\\node_modules\\npm\\bin\\npm-cli.js" "install" "create-react-app@latest" "--global" "--prefix" "C:\\Users\\ipsee\\AppData\\Roaming\\npm-cache\\_npx\\17732" "--loglevel" "error" "--json"
14 verbose node v12.19.0
15 verbose npm  v6.14.8
16 error Cannot read property 'startsWith' of null
17 verbose exit [ 1,true ]