When installing npm install browser-sync, it gives an error - npm WARN optional dep failed, continuing [email protected]?

Question

gulp.js

When installing the plugin npm install browser-sync
Gives an error npm WARN optional dep failed, continuing [email protected]
What is this error and how to overcome it?!
Please help, I have already broken my head what, how and why this is happening!

Answer 1

Gets out often. It doesn't seem to interfere with anything, that's why it's WARN, not ERROR.