Problem after 2 days of using Zabbix 3.0 :(

[pawelp]

Instalation on Ubuntu 14.04 LTS (32bit) - with zabbix help. Everything was ok - 2 days. Now frontend is ok, but zabbix-server dont start (info on website and logs) Ubuntu was update with apt. Now i have info in logs:

The server does not match Zabbix database.

I export database...

[ccsbroadband]

I installed Zabbix 3.0 LTS through Virtual Appliance ISO image setup.
I can't find root password into documentation and password 'zabbix' as per previous version of Zabbix didn't work.

Please help me to get root password for Zabbix Appliance.