The %last_item theme has ckeditor_stylesheets configured without a corresponding ckeditor5-stylesheets configuration. See the <a href=":change_record">change record</a> for details.The %first_items and %last_item themes have ckeditor_stylesheets configured, but without corresponding ckeditor5-stylesheets configurations. See the <a href=":change_record">change record</a> for details.