Error when "npm run build-client-dev"

[lalejand]

Hi,

as documented, I ran "npm run build-client-dev" in a terminal from the web folder, but I get this error:

concurrently "webpack --progress --colors --watch --config ./webpack.config.js" "node-sass --watch --include-path ./assets/scss ./assets/scss/styles.scss ./dist/css/styles.css"

sh: 1: concurrently: not found
npm ERR! code ELIFECYCLE
npm ERR! syscall spawn
npm ERR! file sh
npm ERR! errno ENOENT
npm ERR! web@1.0.0 build-client-dev: concurrently "webpack --progress --colors --watch --config ./webpack.config.js" "node-sass --watch --include-path ./assets/scss ./assets/scss/styles.scss ./dist/css/styles.css"
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the web@1.0.0 build-client-dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR! /home/lalejand/.npm/_logs/2021-05-26T23_27_40_149Z-debug.log

[ajmd17]

Install the concurrently package.

npm install -g concurrently