Yes, you are right, google has updated the library that causes this issue. We have fixed the library actually, you may use Ctrl+F5 to refresh the example, it will work. We are about to release the hot fixes tomorrow. The fix is very simple that you can applied immediately.

Open the file koolreport/core/widgets/google/clients/googlechart.js and look at line 9, you will see

this.options = options;

you change it to:

this.options = Array.isArray(options)?{}:options;

Thank you very much.