The only one reason why you get some error like that, it's because your node version is not compatible with your node-sass version.
So, make sure to checkout the documentation at here: https://www.npmjs.com/package/node-sass
Or this image below will be help you, what the node version can use the node-sass version.
For an example, if you're using node version 12 on your windows ("maybe"), then you should have to install the node-sass version 4.12.
npm install [email protected]
Yeah, like that. So now you only need to install the node-sass version recommended by the node-sass team with the nodes installed on your computer.