This is a sample from journalctl -u plasmalogin.service:
Feb 18 10:58:23 xxx plasmalogin[880]: Initializing...
Feb 18 10:58:23 xxx plasmalogin[880]: Starting...
Feb 18 10:58:23 xxx plasmalogin[880]: Logind interface found
Feb 18 10:58:23 xxx plasmalogin[880]: Adding new display...
Feb 18 10:58:23 xxx plasmalogin[880]: Using VT 1
Feb 18 10:58:23 xxx plasmalogin[880]: Display server started.
Feb 18 10:58:23 xxx plasmalogin[880]: Socket server starting...
Feb 18 10:58:23 xxx plasmalogin[880]: Socket server started.
Feb 18 10:58:23 xxx plasmalogin[880]: Greeter starting...
Feb 18 10:58:23 xxx plasmalogin-helper[890]: [PAM] Starting...
Feb 18 10:58:23 xxx plasmalogin-helper[890]: [PAM] Authenticating...
Feb 18 10:58:23 xxx plasmalogin-helper[890]: [PAM] returning.
Feb 18 10:58:23 xxx plasmalogin-helper[890]: pam_unix(plasmalogin-greeter:session): session opened for user plasmalogin(uid=956) by (uid=0)
Feb 18 10:58:24 xxx plasmalogin-helper[890]: Starting Wayland user session: "/usr/share/plasmalogin/scripts/wayland-session" "/usr/bin/startplasma-login-wayland"
Feb 18 10:58:24 xxx plasmalogin[880]: Greeter session started successfully
Feb 18 10:58:53 xxx systemd[1]: Started Plasma Login Manager.
Feb 18 10:59:28 xxx plasmalogin[880]: Error from greeter session: "Process crashed"
Feb 18 10:59:28 xxx plasmalogin[880]: Auth: plasmalogin-helper (--socket /tmp/plasmalogin-auth-30a3f2e4-6d18-4798-833b-742acf88c845 --id 2 --start /usr/bin/startplasma-logi>
Feb 18 10:59:28 xxx plasmalogin[880]: Error from greeter session: "Process crashed"
Feb 18 10:59:28 xxx plasmalogin[880]: Auth: plasmalogin-helper exited with 1
Feb 18 10:59:28 xxx plasmalogin[880]: Greeter stopped. PLASMALOGIN::Auth::HELPER_AUTH_ERROR
Feb 18 10:59:28 xxx plasmalogin[880]: Signal received: SIGTERM
Feb 18 10:59:28 xxx systemd[1]: Stopping Plasma Login Manager...
Feb 18 10:59:28 xxx plasmalogin[880]: Socket server stopping...
Feb 18 10:59:28 xxx plasmalogin[880]: Socket server stopped.
Feb 18 10:59:28 xxx systemd[1]: plasmalogin.service: Deactivated successfully.
Feb 18 10:59:28 xxx systemd[1]: Stopped Plasma Login Manager.
so I am getting errors for some reason…