Not using Selenium but got Error retrieving a new session from the selenium server - ECONNREFUSED

I have seen this issue in the past I believe with Protractor but today it was NightWatch which is configured to use just ChromeDriver without Selenium and yet was spitting out the below:

Error retrieving a new session from the selenium server Connection refused! Is selenium server started? { Error: connect ECONNREFUSED 127.0.0.1:9515 at Object._errnoException (util.js:1024:11) at _exceptionWithHostPort (util.js:1046:20) at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1182:14) code: 'ECONNREFUSED', errno: 'ECONNREFUSED', syscall: 'connect', address: '127.0.0.1', port: 9515 }

The issue was an outdated chromedriver version. Check your chrome version and use the correct driver per driver from https://sites.google.com/a/chromium.org/chromedriver/downloads