chwala does not work anymore

[Henning]

Hi,

I cannot get chwala to work again after update from ubuntu 12.04->14.04
(kolab 3.1 remained the same, kolab-webadmin package reinstalled).

Roundcube claims not to be able to get the folder list when accessing
the files tab.

chwala just throws very little information, see here:

==> /var/log/roundcubemail/ssl_verify_peer: <==
[28-Apr-2014 17:00:27 +0000]: false

==> /var/log/roundcubemail/errors <==
[28-Apr-2014 17:00:30 +0000]: PHP Error: required kolabformat module not
found (GET /chwala//api/?method=folder_list&_=1398704429942)
[28-Apr-2014 17:00:36 +0000]: PHP Error: Login failed. Unable to connect
to ssl://domain.eu:443. Error: stream_socket_client(): unable to connect
to ssl://domain.eu:443 (Unknown error)
stream_socket_client(): Failed to enable crypto
stream_socket_client(): SSL operation failed with code 1. OpenSSL Error
messages:

Please give me a hint where to find the solution.

Henning