This 'Compressed Viewstate' widget is not working for me, neither on my screen nor on the sample screen provided.

Getting the following error,

Uncaught TypeError: Cannot set property 'innerHTML' of null

    at refreshViewStateSize (CompressedViewstate.js?16994:4)

    at GMFDashboardReports.jsf:116

    at HTMLDocument.<anonymous> (_osjs.js?10_0_604_0:32)

    at l (_osjs.js?10_0_604_0:18)

    at Object.fireWith [as resolveWith] (_osjs.js?10_0_604_0:18)

    at Function.ready (_osjs.js?10_0_604_0:18)

    at HTMLDocument.mb (_osjs.js?10_0_604_0:18)

Any further configuration required apart from the mentioned site property?

Given that this question is related to a Forge component, I would recommend posting your question to the discussion forum for that component, which will notify the component team of your question: