https://github.com/sabre-io/vobject/pull/476 fixes the issue for me.

iRony has two debug options that should give some logs.

// enable debug console showing the internal function calls triggered
// by http requests. This will write log to /var/log/iRony/console
$config['kolabdav_console'] = true;

Fixed.

Further investigation shows that actually Kolab format has CutypeRoom and CutypeUnknown defined. So, we can add these to the map, but still we should probably silently ignore unsupported values.

Fixed.

According to RFC5545 ROOM, UNKNOWN, X-* are valid values. Those aren't supported by Kolab, but we definitely should not throw exceptions on these. I wouldn't touch the map variable. Probably better to handle these in set_cutype().

Hi Daniel, Good catch. The 3rd option looks good to me. parse_input_attributes() should probably accept base_dn input for all kind of objects, not only 'ou' (except domain objects). https://git.kolab.org/diffusion/WAP/browse/master/lib/kolab_api_service.php$419

I'm unable to reproduce. current-user-privilege-set is correct for other user's calendar with lrs permissions. Could you enable debug and provide full request and response for the PROPFIND on a readonly calendar?

Fixed in 20c9539cc5ff. I didn't catch this because it's not an error on PHP >= 7.3.

Fixed in d05e11f145cf.

There was a regression in chwala fixed with https://git.kolab.org/rC9770260d90d8b7. This is fixed in chwala-0.5.6-5.1.

Fixed in 3841f63fbd42 [roundcubemail master] and eee719e6d2f87 [roundcubemail-plugins-kolab master].

This issue is a bug in Roundcube sql cache, so is reproducible with $config['imap_cache'] = 'db' and of course only when using MySQL engine. No issue if it's set to memcache, redis or disabled.

I'm unable to reproduce on current git-master.