node sass does not support your current environment windows 64 bit with unsupported runtime (72) code example
Example 1: Module build failed: Error: Node Sass does not yet support your current environment: OS X 64-bit with Unsupported runtime (79)
npm rebuild node-sass
Example 2: Error: Node Sass does not yet support your current environment: Linux 64-bit with Unsupported runtime (83)
npm install --save-dev node-sass