kolab-webadmin error

[jonathan at lishawa.com]

I installed Kolab 3.1 on CentOS 6.4 (x86_64) and everything was working fine
until yesterday. Now when I login to kolab-webadmin all I see is 'Welcome to the
Kolab Groupware Server Maintenance' heading and the About icon, the other
options such as Users, Groups, Domain etc... are all missing.

When I check /var/log/kolab-webadmin/errors I see the following errors:

[17-Dec-2013 22:36:52] PHP Fatal error:  Call to a member function increment()
on a non-object in /usr/share/kolab-webadmin/lib/Auth/LDAP.php on line 1567
[17-Dec-2013 22:36:52 +0000](lhf1bd4v9vqb53f6tilplvglq3): PHP Error: API Error:
Unable to decode response (GET)

Here is the line in question from /usr/share/kolab-webadmin/lib/Auth/LDAP.php:

1566             // test connection and failover (will result in
$this->mc_available == 0 on complete failure)
1567             $this->memcache->increment('__CONNECTIONTEST__', 1);  // NOP if
key doesn't exist
1568
1569             if (!$this->mc_available) {
1570                 $this->memcache = false;
1571             }

The only thing on the server that has changed in the last couple of days is that
Joomla 3.2 was added along with the following packages:

Dec 16 11:39:25 Installed: postgresql-libs-8.4.18-1.el6_4.x86_64
Dec 16 11:39:25 Installed: libmemcached-0.31-1.1.el6.x86_64
Dec 16 11:39:26 Installed: php-pecl-memcached-1.0.0-1.el6.x86_64
Dec 16 11:39:26 Installed: php-pgsql-5.3.3-27.el6_5.x86_64
Dec 16 11:39:26 Installed: php-pecl-memcache-3.0.5-4.el6.x86_64
Dec 16 11:39:27 Installed: php-pecl-apc-3.1.9-2.el6.x86_64
Dec 16 11:39:27 Installed: php-pecl-mongo-1.4.4-1.el6.x86_64

Any help would be greatly appreciated.

Best,

Jonathan