I'm trying to add some Finnish public holidays to a new Team Calendar, and whether I try to link to the URI
webcal://ical.mac.com/ical/Finnish32Holidays.ics (also tried changing 'webcal://' to 'http://' but no luck)
or else directly import the iCal data as an .ics file, it reports "The uploaded data does not seem to be iCalendar content".
But this same calendar works fine in both Google calendar and Mac OS.
???