title: An error occurred while running npm i (exit code 1)
body: <p>I installed <code>Cordova</code> and <code>Ionic</code> on my machine, afterwards created a blank test application by typing <code>ionic start demo blank</code> however I got an error and couldn't handle it.</p>
  
  <p>The result shown is like this:</p>
  
  <pre><code>ng directory .\demo - done!
      ading and extracting blank starter - done!
      &gt; node-sass@4.5.3 install C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\node-sass
      &gt; node scripts/install.jsr new app with Cordova to target native iOS and Android? Yes
  
      Downloading binary from https://github.com/sass/node-sass/releases/download/v4.5.3/win32-x64-59_binding.node
      Cannot download "https://github.com/sass/node-sass/releases/download/v4.5.3/win32-x64-59_binding.node":
  
      HTTP error 404 Not Found
  
      Hint: If github.com is not accessible in your location
             try setting a proxy via HTTP_PROXY, e.g.
      NIC  DEVAPP  *
             export HTTP_PROXY=http://example.com:1234
      p development with the Ionic DevApp, our fast, on-device testing mobile app
      or configure npm proxy via
      Test on iOS and Android without Native SDKs
             npm config set proxy http://example.com:8080
  
      &gt; uglifyjs-webpack-plugin@0.4.6 postinstall C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\uglifyjs-webpack-plugin
      &gt; node lib/post_install.js
  
  
      &gt; node-sass@4.5.3 postinstall C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\node-sass
      &gt; node scripts/build.js
  
      Building: C:\Program Files\nodejs\node.exe C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags=
      --libsass_ldflags= --libsass_library=
      gyp info it worked if it ends with ok
      gyp verb cli [ 'C:\\Program Files\\nodejs\\node.exe',
      gyp verb cli   'C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\node-gyp\\bin\\node-gyp.js',
      gyp verb cli   'rebuild',
      gyp verb cli   '--verbose',
      gyp verb cli   '--libsass_ext=',
      gyp verb cli   '--libsass_cflags=',
      gyp verb cli   '--libsass_ldflags=',
      gyp verb cli   '--libsass_library=' ]
      gyp info using node-gyp@3.6.2
      gyp info using node@9.2.0 | win32 | x64
      gyp verb command rebuild []
      gyp verb command clean []
      gyp verb clean removing "build" directory
      gyp verb command configure []
      gyp verb check python checking for Python executable "python2" in the PATH
      gyp verb `which` failed Error: not found: python2
      gyp verb `which` failed     at getNotFoundError (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:13:12)
      gyp verb `which` failed     at F (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:68:19)
      gyp verb `which` failed     at E (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:80:29)
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\which\which.js:89:16
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\isexe\index.js:42:5
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\isexe\windows.js:36:5
      gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:166:21)
      gyp verb `which` failed  python2 { Error: not found: python2
      gyp verb `which` failed     at getNotFoundError (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:13:12)
      gyp verb `which` failed     at F (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:68:19)
      gyp verb `which` failed     at E (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:80:29)
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\which\which.js:89:16
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\isexe\index.js:42:5
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\isexe\windows.js:36:5
      gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:166:21)
      gyp verb `which` failed   stack: 'Error: not found: python2\n    at getNotFoundError
      (C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\which\\which.js:13:12)\n    at F
      (C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\which\\which.js:68:19)\n    at E
      (C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\which\\which.js:80:29)\n    at
      C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\which\\which.js:89:16\n    at
      C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\isexe\\index.js:42:5\n    at
      C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\isexe\\windows.js:36:5\n    at
      FSReqWrap.oncomplete (fs.js:166:21)',
      gyp verb `which` failed   code: 'ENOENT' }
      gyp verb check python checking for Python executable "python" in the PATH
      gyp verb `which` failed Error: not found: python
      gyp verb `which` failed     at getNotFoundError (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:13:12)
      gyp verb `which` failed     at F (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:68:19)
      gyp verb `which` failed     at E (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:80:29)
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\which\which.js:89:16
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\isexe\index.js:42:5
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\isexe\windows.js:36:5
      gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:166:21)
      gyp verb `which` failed  python { Error: not found: python
      gyp verb `which` failed     at getNotFoundError (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:13:12)
      gyp verb `which` failed     at F (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:68:19)
      gyp verb `which` failed     at E (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\which\which.js:80:29)
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\which\which.js:89:16
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\isexe\index.js:42:5
      gyp verb `which` failed     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\isexe\windows.js:36:5
      gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:166:21)
      gyp verb `which` failed   stack: 'Error: not found: python\n    at getNotFoundError
      (C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\which\\which.js:13:12)\n    at F
      (C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\which\\which.js:68:19)\n    at E
      (C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\which\\which.js:80:29)\n    at
      C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\which\\which.js:89:16\n    at
      C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\isexe\\index.js:42:5\n    at
      C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\isexe\\windows.js:36:5\n    at
      FSReqWrap.oncomplete (fs.js:166:21)',
      gyp verb `which` failed   code: 'ENOENT' }
      gyp verb could not find "python". checking python launcher
      gyp verb could not find "python". guessing location
      gyp verb ensuring that file exists: C:\Python27\python.exe
      gyp ERR! configure error
      gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
      gyp ERR! stack     at PythonFinder.failNoPython (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\node-gyp\lib\configure.js:483:19)
      gyp ERR! stack     at PythonFinder.&lt;anonymous&gt; (C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\node-gyp\lib\configure.js:508:16)
      gyp ERR! stack     at C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\graceful-fs\polyfills.js:284:29
      gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:166:21)
      gyp ERR! System Windows_NT 10.0.15063
      gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\msi-nb\\Documents\\Ionic
      Projects\\demo\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext="
      "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
      gyp ERR! cwd C:\Users\msi-nb\Documents\Ionic Projects\demo\node_modules\node-sass
      gyp ERR! node -v v9.2.0
      gyp ERR! node-gyp -v v3.6.2
      gyp ERR! not ok
      Build failed with error code: 1
      npm WARN Error: EPERM: operation not permitted, scandir 'C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\cryptiles\node_modules'
      npm WARN  { Error: EPERM: operation not permitted, scandir 'C:\Users\msi-nb\Documents\Ionic
      Projects\demo\node_modules\cryptiles\node_modules'
      npm WARN   stack: 'Error: EPERM: operation not permitted, scandir \'C:\\Users\\msi-nb\\Documents\\Ionic
      Projects\\demo\\node_modules\\cryptiles\\node_modules\'',
      npm WARN   errno: -4048,
      npm WARN   code: 'EPERM',
      npm WARN   syscall: 'scandir',
      npm WARN   path: 'C:\\Users\\msi-nb\\Documents\\Ionic Projects\\demo\\node_modules\\cryptiles\\node_modules' }
      npm ERR! code ELIFECYCLE
      npm ERR! errno 1
      npm ERR! node-sass@4.5.3 postinstall: `node scripts/build.js`
      npm ERR! Exit status 1
      npm ERR!
      npm ERR! Failed at the node-sass@4.5.3 postinstall script.
      npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  
      npm ERR! A complete log of this run can be found in:
      npm ERR!     C:\Users\msi-nb\AppData\Roaming\npm-cache\_logs\2017-11-28T16_46_32_510Z-debug.log
  </code></pre>
  
  <p>I have seen about the same error on this link <a href="https://forum.ionicframework.com/t/error-an-error-occurred-while-running-npm-install-exit-code-1/90573" rel="nofollow noreferrer">[ERROR] An error occurred while running npm install (exit code 1):</a> but I don't understand why I got this proxy error and don't know how to solve it.</p>