I cant get the project running

[2567910]

Hello,
im trying to get the project running but when i run the dev env with npm run dev i get the following error:

error - ./css/index.css (./node_modules/css-loader/dist/cjs.js??ref--5-oneOf-6-1!./node_modules/next/dist/compiled/postcss-loader/cjs.js??ref--5-oneOf-6-2!./css/index.css)
TypeError: Object.entries(...).flatMap is not a function
    at Array.forEach (<anonymous>)

I would like to add a getting startet section to the readme but i cant get it setup myself...

Thank you!

[2567910]

I got it working. I needed to update Node.js.