npm install --saveDev node-sass@4.5.3
possible causes of the error
- Make sure you have a stable internet connection
- The version specified is correct (eg: "sass-loader": "4.5.5" it may not exist)
- Make sure npm is up to date
- Make sure you have not used any other package manager before such as pnpm, yarn
- Make sure the package still exists (worst case)