haciendo pruebas en servidor local con la plantilla AT SUBTHEME aparece el siguiente error:

One or more CSS files were not found or does not exist: themes/adaptivetheme/at_subtheme/generated_files/adaptivetheme_subtheme.lt-ie9.layout.css. Did you delete any files or change a file name? You may need to save the theme settings or check all files names are correct in your theme