ChartJS widget not working after upgrade to 7.1

Hi all, I've recently upgraded a client app to 7.1 and noticed the chartjs widget is not displaying and throwing the following error. "Could not create widget ChartJS.widgets.PieChart.widget.PieChart" On inspection in chrome I've found the following cause of the error "Could not create widget ChartJS.widgets.PieChart.widget.PieChart TypeError: Cannot read property 'global' of undefined" I've tried deleting the widget from my project directory and re-importing it with no success. Does the widget require upgrading?  
1 answers

Issue was caused as another widget required updating in my project. Apparently widgets load sequentially and one out of date widget will break the others