Hello.
I followed the procedure to import my Apple Calendar. At the end of the last synchronization step, I get the message « An error occurred during synchronization. Check the status of the CalDAV server and restart the auto-configuration. » and only one calendar (the first in a list of 8 calendars) is actually synchronized. No matter how many times I Reset and Synchronize again, nothing works: there is still only one calendar synchronized (always the same one).
PS: I read the thread « CalDAV synchronization problem » by elfedagger but it concerns Google Calendar.
Update: in fact, the Gladys calendar includes the new events (those created after the Gladys calendar was created) but not the old ones (except for one calendar)!