Getting error message Module build failed (from ./node_modules/sass-loader/dist/cjs.js) when running npm serve

This could be result of upgrading sass-loader from v7.x to v8.x

As stated in release notes, they'v made significant changes to configuration

Check your vue.config.js - if you find something like this:

module.exports = {
  css: {
    loaderOptions: {
      sass: {
        ....some options here...
      }
    }
  }
}

change it to:

module.exports = {
  css: {
    loaderOptions: {
      sass: {
        sassOptions: {
          ....some options here...
        }
      }
    }
  }
}