Failed to start Load Kernel Modules at Boot on Raspberry Pi 3B+

I have installed ubuntu-18.04.4-preinstalled-server-arm64+raspi3.img on my Raspberry Pi 3 B+. I have no problem to login, but there is a message during bootup the Pi3B+:

[FAILED] Failed to start Load Kernel Modules
See 'systemctl status systemd-modules-load.service' for details

Does anyone know how to fix it? Thanks.

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