Zabbix

..F....... [ZBX-23567] fixed PHP error during first time setup when no user is yet created

Merge in ZBX/zabbix from feature/ZBX-23567-6.4 to release/6.4

* commit '1c5d8ef7397413bb559f4c27e7e7845aea024686':
  ..F....... [ZBX-23567] fixed PHP error during first time setup when no user is yet created