I have a licensed version of fusion chart using it with next js. I am trying to implement the licensed version. The documentation says to implement it like this :

chartObj = new FusionCharts({
    type: 'column2d',
    // Disable credit label
    creditLabel: false, //<------ this is the supposed magic word
    width: '700',
    height: '500',
    dataFormat: 'json'
});

which I did, but it doesn't affect the label at all. I have cleared my cache as suggested in the documents.