Sage 9 doesn’t yet completely support tw2 but there are PRs awaiting…
You will need to git clone the repo branch:
git clone --branch 9-webpack5-tailwind2 git@github.com:ciromattia/sage.git theme_name
changing “theme_name” to your desired name
and update your devUrl and proxyUrl in config.json here:
theme/resources/assets/config.json
and proxyURL here:
assets/build/config.js
Then run from the root of the theme folder:
yarn && yarn build
Then run from the root of the theme folder:
composer install
That should get you up and running. This fork includes postcss-nesting so scss is not supported.