Calendar and tasks are grey in the main menu. Cannot start the lightning

I can't launch the lightning. 'Calendar' and 'Tasks' are grayed out in the menu display.

You don't open a lightning in the View Menu. You open it in the menu of events and tasks, and then click Calendar.

The shortcut is Ctrl + Shift + C

The selection of calendar under view must set options when you open calendar.

Tags: Thunderbird

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