我下载了源码
我先npm install,出现了

npm install
npm WARN deprecated source-map-url@0.4.1: See https://github.com/lydell/source-map-url#deprecated
npm WARN deprecated source-map-resolve@0.6.0: See https://github.com/lydell/source-map-resolve#deprecated
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated source-map-resolve@0.5.3: See https://github.com/lydell/source-map-resolve#deprecated
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated svgo@1.3.2: This SVGO version is no longer supported. Upgrade to v2.x.x.
npm ERR! Cannot read properties of null (reading 'pickAlgorithm')

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\（这里是我的电脑名字）\AppData\Local\npm-cache\_logs\2023-03-18T06_36_03_268Z-debug-0.log

我再npm start

npm start

> react-travel@0.1.0 start
> react-scripts start

'react-scripts' 不是内部或外部命令，也不是可运行的程序
或批处理文件。

请问老师怎么回事啊？我自己写的代码如果代码正常的话是可以运行的。希望老师能再有空时理理我，因为现在这个时间段对我很重要，这个项目必须完成，万分感谢老师！