I tried to install the Lxqt and the KDE plasma image today but unfortunately I could not start the Calamares Installer for some reason. I clicked on the Desktop link and the launcher as well.
The weeklies are automatically built and uploaded without any testing. It's possible some Qt-related rebuild is needed, what's the error if you type 'calamares' in the terminal?
It says: error while loading shared libraries: libkpmcore.so.12: cannot open shared object file: No such file or directory
Do me a favor, from within the live ISO edit /etc/pacman.conf and uncomment [world-gremlins]. Then run as root:
pacman -Sy world-gremlins/calamares
It should install calamares-3.3.14-2. Tell me if that one works.
Sorry for the late answer, lot to do. I uncommented like you said. Calamares start for a brink of a second and closes immediately. Console says: segmentation fault
You actually needed a full -Syu update for it to work. Anyway, fixed in the latest 20250430 batch.