title: How to resolve "Warning: Invalid DOM property `fill-rule`. Did you mean `fillRule`?" on Twilio Flex
body: <p>I just downloaded the <a href="https://github.com/twilio/flex-ui-sample" rel="noreferrer">Twilio Flex Sample App</a> and once I add my appConfig and do a npm start I immediately see several errors:</p>
  
  <ul>
  <li>Warning: Invalid DOM property <code>fill-rule</code>. Did you mean <code>fillRule</code>?</li>
  <li>Warning: Invalid DOM property <code>stroke-width</code>. Did you mean <code>strokeWidth</code>?</li>
  <li>Warning: Invalid DOM property <code>stop-color</code>. Did you mean <code>stopColor</code>?</li>
  <li>Warning: Invalid DOM property <code>stop-opacity</code>. Did you mean <code>stopOpacity</code>?</li>
  </ul>
  
  <p>How can I resolve these?  The @twilio/flex-ui project is not on github to post an issue to and the documentation doesn't mention it as a known issue right now.  </p>