No data in charts

Hello,

I’m using the 0.7.0 version of WordPress Charts plugin on a 4.5.4 version of WordPress. The charts are not showing the data :

Frontend : http://www.screencast.com/t/hpbsbfjjjF

Backend : http://www.screencast.com/t/CqxVAheaBgo

URL : http://www.abcdubac.com/austin/ (but it is not only on this page, all the pages that have a chart is not showing the bars)

Could you please take a look at that ?

Thanks in advance