The grunt command exited with a code 3 error when creating a project

Question

I am not familiar with Grunt and I tried to follow the steps to install it. I get this error and I tried for a week to get it to work. Can someone help me please. I am a junior student and do not know how to do this. I followed the installation instructions on the website. and know his task error. but after that I can not find any working solutions.

Answer 1

Apparently the error is inside the js file.

Answer 2

npm rebuild node-sass

This one helped me.