roundcube 1.3.6 and Kolab Calendar

[devteam]

Hi, All!

Anybody configured roundcube 1.3.6 and Kolab calendar?

p.s. error log:

[25-May-2018 16:32:35 Europe/Berlin] PHP Fatal error:  Uncaught Error:
Call to protected method rcma
il_output_html::search_form() from context 'calendar_ui' in
plugins/calendar/l
ib/calendar_ui.php:817
Stack trace:
#0 program/include/rcmail_output_html.php(1145):
calendar_ui->resources_search
_form(Array)
#1 [internal function]: rcmail_output_html->xml_command(Array)
#2 program/include/rcmail_output_html.php(1013):
preg_replace_callback('/<roun
dcube:([-...', Array, '<roundcube:obje...')
#3 program/include/rcmail_output_html.php(634):
rcmail_output_html->parse_xml(
'<roundcube:obje...')
#4program/include/rcmail_output_html.php(488):
rcmail_output_html->parse('cal
endar', false)
#5 plugins/calendar/calendar.php(338):
rcmail_output_html->send('calendar.cale
nd...')
#6program/lib/Roundcube/rcube_plugin_api.php(493): calendar->calendar_view()
#7index.php(295): rcube_plugin_api->exec_action('calend in
plugins/calendar/lib/calendar_ui.php on line 817