Nightmare.js error code -3
<p>I'm using <code>nightmare</code> to do few commands on a website. My code has few <code>nightmare</code> instances nested each other so I can handle the asynchronous call one by one. </p>

<p>Sometimes my script runs successfull, but there are times that somehow <code>nightmare</code> throws an error. <code>error code: -3</code>. </p>

<p>I've search the Documentation on their github as well on the npm website, but I dont see anything related to error codes. </p>

<p>Does anyone knows what that error means?</p>