一、Database error

The frontend does not match Zabbix database. Current database version (mandatory/optional): 3020000/3020000. Required mandatory version: 3040000. Contact your system administrator.

解决办法：

进入数据库

mysql> show databases; mysql> use zabbix; mysql> update dbversion set mandatory=3040000; mysql> flush privileges;

重新打开web即可解决