Error attempting to compile

[francescoBLT]

Hi
may be I'm not so skilled just now, but I attempt to compile in order to contribute. I'm new to javascript , my exeperience is mainly in C++ and oo programming (more than 15 years) under windows. I followed the instruction for contributing:

git clone https://github.com/namespace-ee/react-calendar-timeline.git react-calendar-timeline
cd react-calendar-timeline
yarn
yarn start

I cloned the project, entered in the dir (first two instructions) but when I issue yarn command the result is:

C:\Program Files\nodejs\node_modules\corepack\dist\lib\corepack.cjs:23284
throw new UsageError(This project is configured to use ${result.spec.name} because ${result.target} has a "packageManager" field);
^

UsageError: This project is configured to use npm because c:\Projects\JSON\react-calendar-timeline\package.json has a "packageManager" field
at Engine.findProjectSpec (C:\Program Files\nodejs\node_modules\corepack\dist\lib\corepack.cjs:23284:21)
at async Engine.executePackageManagerRequest (C:\Program Files\nodejs\node_modules\corepack\dist\lib\corepack.cjs:23314:24)
at async Object.runMain (C:\Program Files\nodejs\node_modules\corepack\dist\lib\corepack.cjs:24007:5) {
clipanion: { type: 'usage' }
}

Node.js v20.16.0

How can I overcome ?
Regards

[Remco4EF]

The error already says it :-)
"UsageError: This project is configured to use npm because c:\Projects\JSON\react-calendar-timeline\package.json has a 'packagemanager' field"

Instead of yarn, use npm.
so checkout, run npm install and run npm run build or

cd into demos dir, run npm install again and run npm run dev