Failed to start WireGuard via wg-quick(8) for wg0

[omss2006]

What's Wrong?

systemctl status wg-quick@wg0.service
● wg-quick@wg0.service - WireGuard via wg-quick(8) for wg0
Loaded: loaded (/lib/systemd/system/wg-quick@.service; indirect; vendor preset: enabled)
Active: failed (Result: exit-code) since Sun 2022-06-05 10:17:00 UTC; 18s ago
Docs: man:wg-quick(8)
man:wg(8)
https://www.wireguard.com/
https://www.wireguard.com/quickstart/
https://git.zx2c4.com/wireguard-tools/about/src/man/wg-quick.8
https://git.zx2c4.com/wireguard-tools/about/src/man/wg.8
Main PID: 933 (code=exited, status=1/FAILURE)

Jun 05 10:17:00 ip-172-26-9-29 systemd[1]: Starting WireGuard via wg-quick(8) for wg0...
Jun 05 10:17:00 ip-172-26-9-29 wg-quick[933]: [#] ip link add wg0 type wireguard
Jun 05 10:17:00 ip-172-26-9-29 wg-quick[933]: RTNETLINK answers: Operation not supported
Jun 05 10:17:00 ip-172-26-9-29 wg-quick[933]: Unable to access interface: Protocol not supported
Jun 05 10:17:00 ip-172-26-9-29 wg-quick[933]: [#] ip link delete dev wg0
Jun 05 10:17:00 ip-172-26-9-29 wg-quick[933]: Cannot find device "wg0"
Jun 05 10:17:00 ip-172-26-9-29 systemd[1]: wg-quick@wg0.service: Main process exited, code=exited,
Jun 05 10:17:00 ip-172-26-9-29 systemd[1]: wg-quick@wg0.service: Failed with result 'exit-code'.
Jun 05 10:17:00 ip-172-26-9-29 systemd[1]: Failed to start WireGuard via wg-quick(8) for wg0.