Not possible to interactively login as root

[D3vil0p3r]

Expected behavior
Login as root user interactively.

Actual behavior
Hello,
I know that login as root is not a safe approach, but I'm just performing some tests on LightDM. I'm using Arch Linux with GNOME 43 Wayland.

I noted that, despite I have a root account on my system (that I can access by terminal by su root), when I use Aether theme and I click on "Switch Account", it says that there are no other accounts apart the standard user I set (so, it is not able to see the root account).

Furthermore, I tried also to set greeter-show-manual-login=true in /etc/lightdm/lightdm.conf but with no luck and I don't think it is related strictly to LightDM, because if I use lightdm-gtk-greeter, I'm able to login interactively as root.

Despite this, I also tried to edit /etc/lightdm/users.conf with the following content by setting minimum-uid=0 (that should be root user). In this file is reported NOTE: If you have AccountsService installed on your system, then LightDM will use this instead and these settings will be ignored and in my Arch machine I'm using AccountsService but even if I create the file /var/lib/AccountsService/users/root with the content:

[User]
Session=
XSession=gnome
Icon=/root/.face
SystemAccount=true

the Aether theme remains on my standard user and does not allow to switch to the root user or to add manually username and password:

Steps To Reproduce

1. During the installation of Arch Linux, set a password for root user and wait for the end of installation
2. Install and configure LightDM with Aether theme
3. Reboot and click on "Switch User"
4. See error:
   

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Additional context, and logs results are extremely useful here!

If relevant, include logs from the following command:
sudo tail /var/log/lightdm/seat0-greeter.log

(lightdm-webkit2-greeter:493): Gtk-CRITICAL **: 16:14:42.353: gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed