Websocket ERROR with HEAD 500

[Mipme]

• Operating System: Mac OS X High Sierra
• Cypress Version: 2.1.0
• Browser Version: Chrome 64 / Electron 59

Is this a Feature or Bug?

Bug

Current behavior:

Cypress installed via npm
Cypress starting
Starting example_spec.js
Browser starting display blank grey page

Console Error: Head / 500
Browser Console Error: WebSocket connection to 'ws://localhost:50816/__socket.io/?EIO=3&transport=websocket' failed: WebSocket is closed before the connection is established.

Desired behavior:

Work as advertised :-)

How to reproduce:

See ### Current behavior

Additional Info (images, stack traces, etc)

Maybe related to #556

[ValerieThoma]

duplicate of #680
resolved by mapping ip address to localhost

[saas2813]

I got logs similar to this. The problem was that my

/etc/hosts

file did not include a line:

127.0.0.1 localhost