I am in Arch KDE with all the latest updates and I now can’t install themes through settings. I never do this anyways but since I make themes and work hard on them I really hope this isn’t a wide spread issue. I always install my themes by hand just placing them in the folders by hand because I have never ever had good luck installing stuff from the settings but I like to test my themes this way because I know some people probably have no idea how to install a theme if not for the system settings doing it for them. So if this is broken it will affect all KDE theme makers simply because not as many people will be installing themes.