Failed Service problem

General system
#1

I run the command sudo systemctl --failed and it shows me this

user@972.service loaded failed failed User Manager for UID 972

What does it means? What can i do?

#2

I have the same and i looked at the boot journal and i see this.
journalctl -b

Sep 28 10:55:59 endeavour-os audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=user-runtime-dir@972 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=s>
Sep 28 10:55:59 endeavour-os systemd[1]: Starting User Manager for UID 972...
Sep 28 10:55:59 endeavour-os kernel: audit: type=1130 audit(1569682559.794:22): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=user-runtime-dir@972 comm="systemd" exe="/usr/lib/systemd/systemd" hostnam>
Sep 28 10:55:59 endeavour-os systemd[542]: pam_unix(systemd-user:account): account lightdm has expired (account expired)
Sep 28 10:55:59 endeavour-os systemd[542]: PAM failed: User account has expired
Sep 28 10:55:59 endeavour-os systemd[542]: user@972.service: Failed to set up PAM session: Operation not permitted
Sep 28 10:55:59 endeavour-os systemd[542]: user@972.service: Failed at step PAM spawning /usr/lib/systemd/systemd: Operation not permitted
Sep 28 10:55:59 endeavour-os systemd[1]: user@972.service: Failed with result 'protocol'.
Sep 28 10:55:59 endeavour-os systemd[1]: Failed to start User Manager for UID 972.
Sep 28 10:55:59 endeavour-os audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=user@972 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed'
Sep 28 10:55:59 endeavour-os systemd[1]: Started Session c1 of user lightdm.

Maybe devs can explain.

#3