Crash with appendScatterSeries

[turulomio]

Traceback (most recent call last):
File "/usr/lib/python3.7/site-packages/xulpymoney-0.13.9999-py3.7.egg/xulpymoney/ui/frmProductReport.py", line 505, in on_actionQuoteImportInvestingCom_triggered
self.update_due_to_quotes_change()
File "/usr/lib/python3.7/site-packages/xulpymoney-0.13.9999-py3.7.egg/xulpymoney/ui/frmProductReport.py", line 306, in update_due_to_quotes_change
self.load_graphics()
File "/usr/lib/python3.7/site-packages/xulpymoney-0.13.9999-py3.7.egg/xulpymoney/ui/frmProductReport.py", line 320, in load_graphics
self.wdgTSHistorical.generate()
File "/usr/lib/python3.7/site-packages/xulpymoney-0.13.9999-py3.7.egg/xulpymoney/ui/wdgProductHistoricalChart.py", line 150, in generate
buy=self.wdgTS.ts.appendScatterSeries(self.tr("Buy operations"))
AttributeError: 'VCTemporalSeriesAlone' object has no attribute 'appendScatterSeries'