Error on ionic setup sass

I am getting error on “ionic setup sass”

throw new Error(’libsass bindings not found. Try reinstalling node-sass?

Error: libsass bindings not found. Try reinstalling node-sass?
at getBinding (D:\dipankar\ionic\node_modules\gulp-sass\node_modules\node-sa
at Object. (D:\dipankar\ionic\node_modules\gulp-sass\node_modules
at Module._compile (module.js:570:32)
at Object.Module._extensions…js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object. (D:\dipankar\ionic\node_modules\gulp-sass\index.js:3:1

Caught exception:
TypeError: Cannot read property ‘bold’ of undefined
at ChildProcess. (C:\Users\xxxxxxxxx\AppData\Roaming\npm
at emitTwo (events.js:106:13)
at ChildProcess.emit (events.js:191:7)
at Process.ChildProcess._handle.onexit (internal/child_process.js:215:12)

Mind letting us know?

Package versions:
node : v6.9.2
ionic: 2.1.17
cordova: 6.4.0
gulp: CLI version 1.2.2
Local version 3.9.1
windows: 7 professional

Please advice. I can not run sass compilation. I am suck.
Please please help some body.

Did you try this?

Try deleting your node_modules folder and doing npm install again (make sure you have all your depenencies saved)