How to fix Uncaught TypeError: Cannot read property 'closure_uid_' of null?

[Nine Fingers]

Hello all,

I am looking to integrate the webgl code with our site and am running
into the following exception:

Uncaught TypeError: Cannot read property 'closure_uid_z0w3j9' of
null

To integrate the code, I've basically taken the divs, css, js etc from
weapp/index.html and applied a few CSS style changes so that the
"earth" is not full-page - nothing else has been modified. From this
server, the weapp demo works fine so I've successfully compiled the
code.

Any suggestions?

Thanks