unable to verify the first certificate

[mushir3589]

Simulator 000000 started
events.js:183
throw er; // Unhandled 'error' event
^

Error: unable to verify the first certificate
at TLSSocket. (_tls_wrap.js:1105:38)
at emitNone (events.js:106:13)
at TLSSocket.emit (events.js:208:7)
at TLSSocket._finishInit (_tls_wrap.js:639:8)
at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:469:38)
Simulator 000000 died (1). Restarting in 10 seconds..