Can't resolve 'react/jsx-dev-runtime'

[bartvdbraak]

I am getting

error - ./pages/_app.js
Module not found: Can't resolve 'react/jsx-dev-runtime' in '<WorkingDirectory>/nextjs/pages'

after yarn install and then yarn dev

also installing the packages with npm is currently broken too and requires --legacy-peer-deps flag.
I am not the most fluent with NPM so if I am doing something wrong, please tell me.

EDIT: I think I somehow broke my install by first using npm i (i think it removed yarn.lock ?). I cloned this repository again and just started using yarn install and yarn dev and it seems to be working.