* Module canonical.launchpad.browser.cal, line 685, in createAndAdd dtstart = event.dtstart.astimezone(
AttributeError: 'NoneType' object has no attribute 'dtstart'
* Module canonical. launchpad. browser. cal, line 685, in createAndAdd astimezone(
dtstart = event.dtstart.
AttributeError: 'NoneType' object has no attribute 'dtstart'