Solution:
1. Open your package.json file and in “devDependencies” section, alter “gulp-sass” version to “^3.0.1” and save the file.
2. Run npm install
npm rebuild node-sass
run npm rebuild node-sass
or
run sudo npm rebuild node-sass
in few instances you require to uninstall and install node-sass library. Attempt:
npm uninstall --save-dev node-sass
and
npm install --save-dev node-sass
node-sass v4.11.0 doesn't work with Node 12.
I faced this problem at the time I upgraded node to v12.
Rebuilding node-sass as indicated by the other answers didn't work as well.
Upgrading node-sass to v4.12.0 solved it for me.
npm install node-sass@4.12.0
npm audit fix - performed for me
npm audit fix
Go the path where node-sass is current and run this command
npm rebuild node-sass --force
go with advanced node-saas you must be fine:
"node-sass": "^4.11.0",