Confluence 5.1.3 - Team Calendars 4.0.1
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After upgrading Team Calendars to 4.0, 9 of the 11 calendars we had in use prior to the upgrade export successfully to an ICS file (as a backup mechanism), 2 of the calendars faile to export generating a System Error with the:
Cause: Stack Trace:[hide]
Referer URL: https://wiki.iso.ksu.edu/calendar/mycalendar.action
Any ideas why this is occurring?