Heads up for thunderbird users: recent update to 78.6.1 messed up my profiles calendar data (most notably: resolved tasks).
Downgrade to 78.6.0 and restore of calendar-data directory in the affected profile was necessary to get going again.
Heads up for thunderbird users: recent update to 78.6.1 messed up my profiles calendar data (most notably: resolved tasks).
Downgrade to 78.6.0 and restore of calendar-data directory in the affected profile was necessary to get going again.