npm error: Failed at the @ development script.

I am starting a new Laravel project with Vue and Vue-router and Tailwind (the Laravel, Vue, and SPA videos form Laracasts). However I keep getting the npm error written in the title of this discussion.

My webpack.mix.js:

let mix = require('laravel-mix');

const tailwindcss = require('tailwindcss')

mix.js('resources/js/app.js', 'public/js') .sass('resources/sass/app.scss', 'public/css') .options({ processCssUrls: false, postCss: [tailwindcss('./path/to/your/tailwind.config.js')], });

My app.scss:

@import "tailwindcss/base"; @import "tailwindcss/components"; @import "tailwindcss/utilities";

I tried a method described elsewhere in this form: removing node_modules and install npm again. But that didn't help.

Most likely I am making a stupid beginners error, but I can't find it.

Any suggestions?

Hubert