Crash report: Error: self signed certificate in certificate chain


```
Error: self signed certificate in certificate chain
    at TLSSocket.onConnectSecure (_tls_wrap.js:1497:34)
    at TLSSocket.emit (events.js:314:20)
    at TLSSocket._finishInit (_tls_wrap.js:932:8)
    at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:706:12)
```

Full report is at [-0x442a8ab971f41](http://crash-reporter.tessel.io/crashes?fingerprint=-0x442a8ab971f41)