CalDAV is not working

CalDAV is not working

I have not been able to get my calendar to sync with CalDAV either on iCal on the Mac or Thunderbird-Lightning on Linux.  On the Mac, iCal says that it can find the server but the username/password is not accepted.  I am, of course, using the same username and password as here on the Zoho site.  Lightning says that the calendar is temporarily unavailable.

I carefully followed the instructions here:




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