MTA setup crash

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1

I would like to setup MTA.

Start → FQDN setup → … → Finish → Yast freezes → out of memory error → reboot

Failed to start reboot.target: Activation of org.freedesktop.systemd1 timed out
Failed to open /dev/initctl: No such device or address
Failed to talk to init daemon.

Any idea?

2

Plus I can not imagine that how it is possible when the system can not perform a direct system ROOT command (reboot)? When can it occur at all? It results uncontrolled, non reliable system…