Error when open new and existing project

Hi,
When I want to start new app, it show something like this. It also happen when opening existing app.
Can someone help me regarding this?

Thank you

Alifs-MacBook-Pro:~ alifammar$ sudo ionic start errortest --v3

? What starter would you like to use: tabs
:heavy_check_mark: Creating directory ./errortest - done!
:heavy_check_mark: Downloading and extracting tabs starter - done!

? Would you like to integrate your new app with Cordova to target native iOS and
Android? Yes
:heavy_check_mark: Personalizing ionic.config.json and package.json - done!

ionic integrations enable cordova --quiet
:heavy_check_mark: Downloading integration cordova - done!
:heavy_check_mark: Copying integrations files to project - done!
[OK] Added cordova integration!

Installing dependencies may take several minutes.

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  • :key: Test on iOS and Android without Native SDKs
  • :rocket: LiveReload for instant style and JS updates

️–> Install DevApp: Ionic DevApp - Appflow

npm i
:heavy_multiplication_x: Running command - failed!
[ERROR] An error occurred while running npm i (exit code 1):

    > fsevents@1.2.7 install 
    /Users/alifammar/errortest/node_modules/fsevents
    > node install
    
    node-pre-gyp WARN Using request for node-pre-gyp https download 
    node-pre-gyp WARN Pre-built binaries not installable for fsevents@1.2.7 
    and node@10.15.3 (node-v64 ABI, unknown) (falling back to source compile 
    with node-gyp) 
    node-pre-gyp WARN Hit error EACCES: permission denied, mkdir 
    '/Users/alifammar/errortest/node_modules/fsevents/lib' 
    gyp ERR! configure error 
    gyp ERR! stack Error: EACCES: permission denied, mkdir 
    '/Users/alifammar/errortest/node_modules/fsevents/build'
    gyp ERR! System Darwin 18.2.0
    gyp ERR! command "/usr/local/bin/node" 
    "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" 
    "configure" "--fallback-to-build" 
    "--module=/Users/alifammar/errortest/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node" 
    "--module_name=fse" 
    "--module_path=/Users/alifammar/errortest/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64" 
    "--napi_version=3" "--node_abi_napi=napi"
    gyp ERR! cwd /Users/alifammar/errortest/node_modules/fsevents
    gyp ERR! node -v v10.15.3
    gyp ERR! node-gyp -v v3.8.0
    gyp ERR! not ok 
    node-pre-gyp ERR! build error 
    node-pre-gyp ERR! stack Error: Failed to execute '/usr/local/bin/node 
    /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js 
    configure --fallback-to-build 
    --module=/Users/alifammar/errortest/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node 
    --module_name=fse 
    --module_path=/Users/alifammar/errortest/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64 
    --napi_version=3 --node_abi_napi=napi' (1)
    node-pre-gyp ERR! stack     at ChildProcess.<anonymous> 
    (/Users/alifammar/errortest/node_modules/fsevents/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
    node-pre-gyp ERR! stack     at ChildProcess.emit (events.js:189:13)
    node-pre-gyp ERR! stack     at maybeClose 
    (internal/child_process.js:970:16)
    node-pre-gyp ERR! stack     at Process.ChildProcess._handle.onexit 
    (internal/child_process.js:259:5)
    node-pre-gyp ERR! System Darwin 18.2.0
    node-pre-gyp ERR! command "/usr/local/bin/node" 
    "/Users/alifammar/errortest/node_modules/fsevents/node_modules/node-pre-gyp/bin/node-pre-gyp" 
    "install" "--fallback-to-build"
    node-pre-gyp ERR! cwd /Users/alifammar/errortest/node_modules/fsevents
    node-pre-gyp ERR! node -v v10.15.3
    node-pre-gyp ERR! node-pre-gyp -v v0.10.3
    node-pre-gyp ERR! not ok 
    Failed to execute '/usr/local/bin/node 
    /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js 
    configure --fallback-to-build 
    --module=/Users/alifammar/errortest/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node 
    --module_name=fse 
    --module_path=/Users/alifammar/errortest/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64 
    --napi_version=3 --node_abi_napi=napi' (1)
    
    > node-sass@4.11.0 install 
    /Users/alifammar/errortest/node_modules/node-sass
    > node scripts/install.js
    
    Unable to save binary 
    /Users/alifammar/errortest/node_modules/node-sass/vendor/darwin-x64-64 : 
    { Error: EACCES: permission denied, mkdir 
    '/Users/alifammar/errortest/node_modules/node-sass/vendor'
         at Object.mkdirSync (fs.js:752:3)
         at sync 
    (/Users/alifammar/errortest/node_modules/mkdirp/index.js:71:13)
         at Function.sync 
    (/Users/alifammar/errortest/node_modules/mkdirp/index.js:77:24)
         at checkAndDownloadBinary 
    (/Users/alifammar/errortest/node_modules/node-sass/scripts/install.js:114:11)
         at Object.<anonymous> 
    (/Users/alifammar/errortest/node_modules/node-sass/scripts/install.js:157:1)
         at Module._compile (internal/modules/cjs/loader.js:701:30)
         at Object.Module._extensions..js 
    (internal/modules/cjs/loader.js:712:10)
         at Module.load (internal/modules/cjs/loader.js:600:32)
         at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
         at Function.Module._load (internal/modules/cjs/loader.js:531:3)
       errno: -13,
       syscall: 'mkdir',
       code: 'EACCES',
       path: '/Users/alifammar/errortest/node_modules/node-sass/vendor' }
    
    > uglifyjs-webpack-plugin@0.4.6 postinstall 
    /Users/alifammar/errortest/node_modules/uglifyjs-webpack-plugin
    > node lib/post_install.js
    
    
    > node-sass@4.11.0 postinstall 
    /Users/alifammar/errortest/node_modules/node-sass
    > node scripts/build.js
    
    Building: /usr/local/bin/node 
    /Users/alifammar/errortest/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 [ '/usr/local/bin/node',
    gyp verb cli   
    '/Users/alifammar/errortest/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@3.8.0
    gyp info using node@10.15.3 | darwin | 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 
    (/Users/alifammar/errortest/node_modules/which/which.js:13:12)
    gyp verb `which` failed     at F 
    (/Users/alifammar/errortest/node_modules/which/which.js:68:19)
    gyp verb `which` failed     at E 
    (/Users/alifammar/errortest/node_modules/which/which.js:80:29)
    gyp verb `which` failed     at 
    /Users/alifammar/errortest/node_modules/which/which.js:89:16
    gyp verb `which` failed     at 
    /Users/alifammar/errortest/node_modules/isexe/index.js:42:5
    gyp verb `which` failed     at 
    /Users/alifammar/errortest/node_modules/isexe/mode.js:8:5
    gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:153:21)
    gyp verb `which` failed  python2 { Error: not found: python2
    gyp verb `which` failed     at getNotFoundError 
    (/Users/alifammar/errortest/node_modules/which/which.js:13:12)
    gyp verb `which` failed     at F 
    (/Users/alifammar/errortest/node_modules/which/which.js:68:19)
    gyp verb `which` failed     at E 
    (/Users/alifammar/errortest/node_modules/which/which.js:80:29)
    gyp verb `which` failed     at 
    /Users/alifammar/errortest/node_modules/which/which.js:89:16
    gyp verb `which` failed     at 
    /Users/alifammar/errortest/node_modules/isexe/index.js:42:5
    gyp verb `which` failed     at 
    /Users/alifammar/errortest/node_modules/isexe/mode.js:8:5
    gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:153:21)
    gyp verb `which` failed   stack:
    gyp verb `which` failed    'Error: not found: python2\n    at 
    getNotFoundError 
    (/Users/alifammar/errortest/node_modules/which/which.js:13:12)\n    at F 
    (/Users/alifammar/errortest/node_modules/which/which.js:68:19)\n    at E 
    (/Users/alifammar/errortest/node_modules/which/which.js:80:29)\n    at 
    /Users/alifammar/errortest/node_modules/which/which.js:89:16\n    at 
    /Users/alifammar/errortest/node_modules/isexe/index.js:42:5\n    at 
    /Users/alifammar/errortest/node_modules/isexe/mode.js:8:5\n    at 
    FSReqWrap.oncomplete (fs.js:153:21)',
    gyp verb `which` failed   code: 'ENOENT' }
    gyp verb check python checking for Python executable "python" in the 
    PATH
    gyp verb `which` succeeded python /usr/bin/python
    gyp verb check python version `/usr/bin/python -c "import sys; print 
    "2.7.10
    gyp verb check python version .%s.%s" % sys.version_info[:3];"` 
    returned: %j
    gyp verb get node dir no --target version specified, falling back to 
    host node version: 10.15.3
    gyp verb command install [ '10.15.3' ]
    gyp verb install input version string "10.15.3"
    gyp verb install installing version: 10.15.3
    gyp verb install --ensure was passed, so won't reinstall if already 
    installed
    gyp verb install version is already installed, need to check 
    "installVersion"
    gyp verb got "installVersion" 9
    gyp verb needs "installVersion" 9
    gyp verb install version is good
    gyp verb get node dir target node version installed: 10.15.3
    gyp verb build dir attempting to create "build" dir: 
    /Users/alifammar/errortest/node_modules/node-sass/build
    gyp ERR! configure error 
    gyp ERR! stack Error: EACCES: permission denied, mkdir 
    '/Users/alifammar/errortest/node_modules/node-sass/build'
    gyp ERR! System Darwin 18.2.0
    gyp ERR! command "/usr/local/bin/node" 
    "/Users/alifammar/errortest/node_modules/node-gyp/bin/node-gyp.js" 
    "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" 
    "--libsass_ldflags=" "--libsass_library="
    gyp ERR! cwd /Users/alifammar/errortest/node_modules/node-sass
    gyp ERR! node -v v10.15.3
    gyp ERR! node-gyp -v v3.8.0
    gyp ERR! not ok 
    Build failed with error code: 1
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.7 
    (node_modules/fsevents):
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.7 install: 
    `node install`
    npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1
    
    npm ERR! code ELIFECYCLE
    npm ERR! errno 1
    npm ERR! node-sass@4.11.0 postinstall: `node scripts/build.js`
    npm ERR! Exit status 1
    npm ERR! 
    npm ERR! Failed at the node-sass@4.11.0 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!     
    /Users/alifammar/.npm/_logs/2019-04-09T04_45_42_061Z-debug.log

Im using ionic CLI 3.19.0