[Bug 1846423]

[Florian-unger]

I am also struggling with this error - half of my calendars is not
working anymore...

No change, same behavior in recent Thunderbird 68.2.2 (64-bit)

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https://bugs.launchpad.net/bugs/1846423

Title:
  Lightning: Cannot dismiss reminders. Got a VALUE parameter with an
  illegal type for property: VALUE=DURATION

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