Checkbox Not Working

I am trying to create a checkbox inside a node. I was following this example but I am getting following error -

Uncaught Error: GraphObject.make failed to complete, it may be conflicting with another var.

Initially I thought $ is conflicting with jQuery but its not the case. Though I removed jQuery still it is giving the same error. Created a zip for your reference -

Note: The zip content is exactly the copy of this link and no third party library is involved. The issue is reproduced with go-js version 1.5.18.

That example has changed for 1.6 to make use of new features.

Why not upgrade to the latest 1.6?

Thanks it worked with 1.6.9. Stupid me! could have tried before posting :)