Certification error after bootstrap ember server

I am inside coorpration proxy and I have an certification error everytime I start the ember server,

➜  Dummy ember s
Could not start watchman
Visit http://ift.tt/2huy34z for more info.

Just getting started with Ember? Please visit http://localhost:4200/ember-getting-started to get going

Livereload server on http://localhost:49152
Serving on http://localhost:4200/
{ Error: self signed certificate in certificate chain
    at Error (native)
    at TLSSocket.<anonymous> (_tls_wrap.js:1060:38)
    at emitNone (events.js:86:13)
    at TLSSocket.emit (events.js:185:7)
    at TLSSocket._finishInit (_tls_wrap.js:584:8)
    at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:416:38) code: 'SELF_SIGNED_CERT_IN_CHAIN' }

Build successful - 16244ms.

I have try to use ember s --ssl=false but the issue persist.

Any hint is appreciated.