I have the same problem.
After installation via USB stick, the web GUI works only for a few minutes. After that, port 1443 is not reachable any more. The reason seams to be the stopped lighttpd service. It’s possible to start this service via ‘sudo systemctl start lighttpd’ but port 1443 is still not at listening state. It’s not visible via ‘sudo ps aux | grep 1443’. EasyNAS is still reachable via ping and it is also possible to execute a update (from 220.127.116.11 to 18.104.22.168). I have also installed the firmware for the Realtek NIC (sudo zypper install kernel-firmware-realtek).
Where can I find boot logs and other logs? I’ve found some logs under ‘/var/log/’ but they are not very interesting…