I use another theme for desktop (PC). I want to make clean retina for mobile themes. I use any mobile theme switcher for this. But when activated the “any mobile theme switcher” plugin, and clean retina activated also, the “server error” will be displayed. Or, when activated the “any mobile theme switcher” plugin, and in the menu of this plugin are choosen clean retina for mobile themes, the same error will be displayed also.
@laode_aman Our theme Clean Retina is a responsive theme so it will look fine for all size devices. Our theme is not a mobile only targeted theme so what you are trying to do may not work.