Unable to run XDM on Milk-V Duo S SD

[rembu2001]

I tried installing xdm on SG200X Debian to see if I could create an XDMCP server on my Milk-V Duo S SD and then access the graphical desktop via my main machine using something like Xephyr. However, every time I try to run the command systemctl start xdm.service and authenticate, it spits this error:
Job for xdm.service failed because the control process exited with error code. See "systemctl status xdm.service" and "journalctl -xeu xdm.service" for details.

systemctl status xdm.service gives:
xdm.service - X-Window Display Manager Loaded: loaded (/usr/lib/systemd/system/xdm.service; indirect; preset: enabled) Active: failed (Result: exit-code) since Wed 2024-06-19 03:51:19 UTC; 4min 28s ago Invocation: 39a7170d85d24c739e87abc53cffdca1 Process: 1021 ExecStartPre=/bin/sh -c [ "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/usr/bin/xdm" ] (code=exited, status=1/FAILURE) Jun 19 03:51:19 duos systemd[1]: Starting xdm.service - X-Window Display Manager... Jun 19 03:51:19 duos systemd[1]: xdm.service: Control process exited, code=exited, status=1/FAILURE Jun 19 03:51:19 duos systemd[1]: xdm.service: Failed with result 'exit-code'. Jun 19 03:51:19 duos systemd[1]: Failed to start xdm.service - X-Window Display Manager.

journalctl -xeu xdm.service gives:
Jun 19 03:51:19 duos systemd[1]: Starting xdm.service - X-Window Display Manager... ░░ Subject: A start job for unit xdm.service has begun execution ░░ Defined-By: systemd ░░ Support: https://www.debian.org/support ░░ ░░ A start job for unit xdm.service has begun execution. ░░ ░░ The job identifier is 1945. Jun 19 03:51:19 duos systemd[1]: xdm.service: Control process exited, code=exited, status=1/FAILURE ░░ Subject: Unit process exited ░░ Defined-By: systemd ░░ Support: https://www.debian.org/support ░░ ░░ An ExecStartPre= process belonging to unit xdm.service has exited. ░░ ░░ The process' exit code is 'exited' and its exit status is 1. Jun 19 03:51:19 duos systemd[1]: xdm.service: Failed with result 'exit-code'. ░░ Subject: Unit failed ░░ Defined-By: systemd ░░ Support: https://www.debian.org/support ░░ ░░ The unit xdm.service has entered the 'failed' state with result 'exit-code'. Jun 19 03:51:19 duos systemd[1]: Failed to start xdm.service - X-Window Display Manager. ░░ Subject: A start job for unit xdm.service has failed ░░ Defined-By: systemd ░░ Support: https://www.debian.org/support ░░ ░░ A start job for unit xdm.service has finished with a failure. ░░ ░░ The job identifier is 1945 and the job result is failed.

Not sure what the cause is, let alone the fix.