Fancy timer bug

HTML

<script src="https://igorsfunnel.com/assets/vendor/fancy-timer/js/fancy-timer.min.js"></script>
<link rel="stylesheet" href="https://igorsfunnel.com/assets/vendor/fancy-timer/css/fancy-timer.css">
<div id="fancy-timer"></div>

JavaScript

var ft = new FancyTimer(
        document.getElementById('fancy-timer'),
        {
          value: new Date("2021-07-21T12:45:00.000Z"),
          onFinish: function() {
            console.log('End');
          }
        }
      );
      ft.start(-1);