Cannot find module 'gulp-sass' code example

Example 1: Cannot find module 'node-sass'

sudo npm install --save-dev  --unsafe-perm node-sass

Example 2: Error: Cannot find module 'node-sass'

sudo npm install --save-dev  --unsafe-perm node-sass

Example 3: gulp serve Cannot find module 'gulp-sass'

change to version "gulp-sass": "3.0.0"