It looks like there are lockfile issues on cache file and possibly your calendar file or its related storage in TB... I would try the following: - right click calendar and see if you can disable it (not sure available for ICS) - restart computer (this should vlear all lock files) - check that there is no tmp or lock file related yo TB or calendar in you webdav drive (you may need to display hidden files in File Explorer) it is likely to start with a tild ~ prefix and be small size like 1KB just move it off the drive if present - then run thunderbird.exe -p to show profiles and tick offline mode before starting you profile... - clear TB cache - re-enable online mode - re-enable your calendar The idea here is to try to clear the cache before your calendar is accessed again... Alternative options may be: - close TB and move out the C:\Users\Tim\AppData\Roaming\Thunderbird\Profiles\yzmbng4o.tim\calendar-data\cache.sqlite file out of your profile. - Unsbscribe from Calendar and re-open it in TB - Run TB in safe-mode and try again Those are just suggestions... none of them may work but perhaps worth a try... If I have time later I'll try subscribe to ics in 68 and update to 72 see if I can reproduce your issue...
Bug 1666101 Comment 5 Edit History
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It looks like there are lockfile issues on cache file and possibly your calendar file or its related storage in TB... I would try the following: - right click calendar and see if you can disable it (not sure available for ICS) - restart computer (this should clear all lock files) - check that there is no tmp or lock file related yo TB or calendar in you webdav drive (you may need to display hidden files in File Explorer) it is likely to start with a tild ~ prefix and be small size like 1KB just move it off the drive if present - then run thunderbird.exe -p to show profiles and tick offline mode before starting you profile... - clear TB cache - re-enable online mode - re-enable your calendar The idea here is to try to clear the cache before your calendar is accessed again... Alternative options may be: - close TB and move out the C:\Users\Tim\AppData\Roaming\Thunderbird\Profiles\yzmbng4o.tim\calendar-data\cache.sqlite file out of your profile. - Unsbscribe from Calendar and re-open it in TB - Run TB in safe-mode and try again Those are just suggestions... none of them may work but perhaps worth a try... If I have time later I'll try subscribe to ics in 68 and update to 72 see if I can reproduce your issue...