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Tasks works short time only after uninstall/re-install Lightning. Becomes R/O then disappears.

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Right now nothing is in my Today Pane. If I do Events and Tasks > Tasks, I get a tasks tab and see my tasks but not in the pane. The tasks are Read Only. I just removed Lightning and restarted. Re-added and restarted. Oops! I expected the Today Pane to work and to get my tasks RW but the pane is blank so now it's worse than usual. Tasks used to work fine. I don't know with which version of Thunderbird this started. I have Windows 10, latest version and a standard Dell desktop of recent vintage.

Right now nothing is in my Today Pane. If I do Events and Tasks > Tasks, I get a tasks tab and see my tasks but not in the pane. The tasks are Read Only. I just removed Lightning and restarted. Re-added and restarted. Oops! I expected the Today Pane to work and to get my tasks RW but the pane is blank so now it's worse than usual. Tasks used to work fine. I don't know with which version of Thunderbird this started. I have Windows 10, latest version and a standard Dell desktop of recent vintage.

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did you use the gdata provider and it has become disabled following an update perhaps?

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The Provider provides calendar support too which is fine. But I am going to disable it and re-enable right now. That worked! Let's see if it holds. Thanks.

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I also have this problem. I tried disabling the Google Calendar Provider then re-enabling it and that did not fix the issue. I tried removing both the Google Calendar Provider and the Lightning Add-ons then adding them back, but that did not fix it. After that I had to reconnect the Calendar to my Google account, but that makes sense to me. The tasks are still there because they show up on the Today Pane and I still get reminders, but they do not show up on the Tasks tab and the ways to view them are limited on the Today Pane.

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I lost the funtion calendar and task in Thurderbird. After updating the Thurderbird, i still found my task. But when i updated the Window 10 the i can not find the calendar and my task any more buttons are gone.

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i send the picture of my problem: do not find the task convert