Angular 4 - I keep getting Cannot find module 'portfinder' even after installing portfinder manually

I keep getting this error in my Terminal using ng serve in terminal, I already tried ='npm install portfinder, also npm uninstall -g angular-cli, npm cache clean, npm install npm -g, npm install -g angular-cli, but none working and I keep getting it, I'm using npm 3.10.10, Angular4 and the error as below:

Cannot find module 'portfinder'
Error: Cannot find module 'portfinder'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/usr/local/lib/node_modules/angular-cli/commands/serve.js:6:18)
    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 Class.includedCommands (/usr/local/lib/node_modules/angular-cli/addon/index.js:21:16)
    at /usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/lib/models/project.js:392:61
    at Array.forEach (native)
    at Project.addonCommands (/usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/lib/models/project.js:391:15)
    at Project.eachAddonCommand (/usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/lib/models/project.js:426:30)
    at module.exports (/usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/lib/cli/lookup-command.js:33:13)
    at CLI.<anonymous> (/usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/lib/cli/cli.js:34:26)
    at tryCatch (/usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/node_modules/rsvp/dist/lib/rsvp/-internal.js:215:12)
    at invokeCallback (/usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/node_modules/rsvp/dist/lib/rsvp/-internal.js:230:13)
    at publish (/usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/node_modules/rsvp/dist/lib/rsvp/-internal.js:198:7)
    at flush (/usr/local/lib/node_modules/angular-cli/node_modules/angular-cli/node_modules/rsvp/dist/lib/rsvp/asap.js:82:5)
    at _combinedTickCallback (internal/process/next_tick.js:73:7)
    at process._tickCallback (internal/process/next_tick.js:104:9)

via Alireza