I have fixed an issue with BETA 2 where I accidentally left a user group in the variable spjscharts_restrictAddNewChartToGroup in the SPJSCharts_loader.html like this:
var spjscharts_restrictAddNewChartToGroup = "TestGroup1";
This would prevent the add new chart button from showing. The default value here should be like this:
var spjscharts_restrictAddNewChartToGroup = "";
I have also removed a call to get the user profile for the current user because this failed in SP foundation where the user profile is not accessible.
You find information about SPJS Charts v7 and a link to download it here: http://spjsblog.com/2018/04/29/spjs-charts-v7/