Changed popup error message to state that the problem is with the current platform.
Changed popup error message to state that the problem is with the current platform.

johnbolia/plyer,kostyll/plyer,kostyll/plyer,kivy/plyer,kived/plyer,kivy/plyer,johnbolia/plyer,cleett/plyer,KeyWeeUsr/plyer,KeyWeeUsr/plyer,cleett/plyer,KeyWeeUsr/plyer,kived/plyer,inclement/plyer,kivy/plyer