If this issue occurs there are chances you are using an old version of Webuzo and have disabled auto updates for Webuzo.
The fix for this would be to SSH to your server and set update preference in :
/usr/local/webuzo/universal.php
and set the value for following line :
'update' => 0
to
'update' => 2
and execute the cron command :
/usr/local/emps/bin/php /usr/local/webuzo/cron.php
This should update Webuzo to the latest version and then you can set the update preference back to disable if you want. Though we recommend you set Webuzo updates as enabled.