Hello,
on you website(https://www.zabbix.com/server_monitoring) you wrote: "Use out-of-the-box templates to monitor all popular servers & OS". I guess you mean these templates: https://github.com/v-zhuravlev/zbx_template_pack/tree/master/out/server/3.4, BUT in the latest zabbix version there is no out-of-the-box templates for server. So please fix you website or add them to the zabbix 3.4.7.