Since the update 2016 Q1 I can't add a second series to a Pie Chart, I was able to add 2 series to a Pie Chart in the previous version.
I got this error: 'It is not allowed to add two pie series in TKChart!', reason: 'TKChart can display only one pie series at a time. You have to remove the old pie series first.'
The screenshot is there for reference to the way it showed before.
Is it a bug or is there a quick fix for the problem?