Edit File: admin.min.js
!function(n,o){"use strict";function t(){o.ajax({type:"POST",url:ajaxurl,data:{nonce:storefrontNUX.nonce,action:"storefront_dismiss_notice"},dataType:"json"})}n&&o(function(){o(document).on("click",".sf-notice-nux .notice-dismiss",function(){t()}),o(document).on("click",".sf-nux-dismiss-button",function(){t(),o(".storefront-intro-setup").hide(),o(".storefront-intro-message").fadeIn("slow")})})}(window.wp,jQuery);