The ASU server has been move to https://sysupgrade.kyarucloud.moe.
Please update your ASU server via:
uci set attendedsysupgrade.server.url='https://sysupgrade.kyarucloud.moe'
uci commit attendedsysupgrade
Or do it via LuCI: Attended Sysupgrade - Configuration.
You will be redirected to our new server in 30 seconds.