title: ERROR] An error occurred while running subprocess ionic-app-scripts
body: <p>I am getting below error while i run ionic project:
  I'm getting an error when building an Ionic 3 app 1</p>
  
  <pre><code>[ERROR] ionic-app-scripts has unexpectedly closed (exit code 1).
  
          The Ionic CLI will exit. Please check any output above for error details.
  ionic3-firebase-shopping-cart-master anand$ ionic cordova run android
  &gt; ionic-app-scripts build --target cordova --platform android
  /Users/anand/projects/Ionic/ShoppingCart/ionic3-firebase-shopping-cart-master/node_modules/node-sass/lib/binding.js:13
        throw new Error(errors.unsupportedEnvironment());
        ^
  
  Error: Node Sass does not yet support your current environment: OS X 64-bit with Unsupported runtime (64)
  For more information on which environments are supported please see:
  https://github.com/sass/node-sass/releases/tag/v4.5.3
      at module.exports (/Users/anand/projects/Ionic/ShoppingCart/ionic3-firebase-shopping-cart-master/node_modules/node-sass/lib/binding.js:13:13)
      at Object.&lt;anonymous&gt; (/Users/anand/projects/Ionic/ShoppingCart/ionic3-firebase-shopping-cart-master/node_modules/node-sass/lib/index.js:14:35)
      at Module._compile (internal/modules/cjs/loader.js:678:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
      at Module.load (internal/modules/cjs/loader.js:589:32)
      at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
      at Function.Module._load (internal/modules/cjs/loader.js:520:3)
      at Module.require (internal/modules/cjs/loader.js:626:17)
      at require (internal/modules/cjs/helpers.js:20:18)
      at Object.&lt;anonymous&gt; (/Users/anand/projects/Ionic/ShoppingCart/ionic3-firebase-shopping-cart-master/node_modules/@ionic/app-scripts/dist/core/bundle-components.js:6:16)
  [ERROR] An error occurred while running subprocess ionic-app-scripts.
  
          ionic-app-scripts build --target cordova --platform android exited with exit code 1.
  
          Re-running this command with the --verbose flag may provide more information.
  </code></pre>
  
  <p>ionic3-firebase-shopping-cart-master anand$ ionic cordova platform rm ios</p>
  
  <blockquote>
    <p>cordova platform remove ios --save
        Removing platform ios from config.xml file...
    ionic3-firebase-shopping-cart-master anand$ ionic cordova run android
    ionic-app-scripts build --target cordova --platform android
        /Users/anand/projects/Ionic/ShoppingCart/ionic3-firebase-shopping-cart-master/node_modules/node-sass/lib/binding.js:13
              throw new Error(errors.unsupportedEnvironment());</p>
  </blockquote>