I’m having the same issue, but for me is worse, since it’s the 11th time I’m trying to install Manjaro KDE on a SSD. I just managed to “install” it now because I used gparted to add the “esp” flag, that for some odd reason they decided to remove from Calamares and it’s kinda missing, because, at least for me selecting only the “boot” flag wasn’t making it boot after install. I also noticed other issues with the Plasma ISO, so unstable and buggy, Pamac hasn’t shown any app, unable to use pacman -Syy, tons of errors, like GPGME error: No data, error: failed to update multilib, failed to synchronize all databases…
I think this “latest” ISO is buggy. I’ll try on not using “esp” through Gparted and only install as I always installed and see what happens, this time I’d it with other iso or even the “minimal” iso. I want the KDE version.