[kronolith] connection to Google or SOGo caldav calendars does not work

[Marco Giunta]

Hi at all,
I've install a fresh copy of Horde 4.0.1 with Kronolith 3.0.1; I'm not 
able to connect to a Google  or to a SOGo (1.3.6) caldav calendar: error 
message is 'The remote server URL does not point to a CalDAV 
directory.'. With same configuration I'm able to connect to calendars 
through Mozilla Lightning.

At first, Kronolith complains about an 'outdated version of WebDAV 
protocol', but after change line 607 in 'lib/Driver/Ical.php' now it 
complains about 'CalDAV directory'.

Which server is compatible with kronolith Caldav ?? Only Davical ? Did 
someone try to use another caldav server ???

Regards,
   Marco