Fabric js TypeError: Cannot read property 'clearRect' of null with animate() function

Fabric js has a method to animate the object:

            addedObject.animate('top', obj.top, {
              duration: 3000,
              onChange: canvas.requestRenderAll.bind(canvas),
              easing: fabric.util.ease['easeOutBack']
            });
  

I have some animations, which are done using the animate method. The problem is it gives me Cannot read property 'clearRect' of null. It is specifically due to onChange line in the animate function.

Error: Uncaught [TypeError: Cannot read property 'clearRect' of null]
    at reportException (/Users/dennis/Documents/projects/ideaonce/backend/node_modules/jsdom/lib/jsdom/living/helpers/runtime-script-errors.js:62:24)
    at Timeout.callback [as _onTimeout] (/Users/dennis/Documents/projects/ideaonce/backend/node_modules/jsdom/lib/jsdom/browser/Window.js:645:7)
    at listOnTimeout (internal/timers.js:554:17)
    at processTimers (internal/timers.js:497:7) TypeError: Cannot read property 'clearRect' of null
    at klass.clearContext (/Users/dennis/Documents/projects/ideaonce/backend/node_modules/fabric/dist/fabric.js:9317:11)
    at klass.renderCanvas (/Users/dennis/Documents/projects/ideaonce/backend/node_modules/fabric/dist/fabric.js:9427:12)
    at klass.renderAll (/Users/dennis/Documents/projects/ideaonce/backend/node_modules/fabric/dist/fabric.js:9358:12)
    at klass.renderAndReset (/Users/dennis/Documents/projects/ideaonce/backend/node_modules/fabric/dist/fabric.js:9374:12)
    at Timeout.callback [as _onTimeout] (/Users/dennis/Documents/projects/ideaonce/backend/node_modules/jsdom/lib/jsdom/browser/Window.js:643:19)

I followed this example: https://github.com/mifi/editly/blob/master/examples/customFabric.js

Any help is highly appreciated!
Fabric js animate method: http://fabricjs.com/animation-easing

Start with the animate() onChange callback and compare it with examples/customFabric.js. Trace canvas.requestRenderAll through fabric/dist/fabric.js, especially clearContext and renderAll, using the provided jsdom stack. Done means reproducing the null clearRect error and confirming that the animation renders without it.