jQuery Mobile

I am experimenting with this plugin https://www.ads-software.com/extend/plugins/jquery-mobile/

but when I try to go on other page in beck-end i get this message

“).append(d);return function(a){if(!(a in b)){var h=document.createElement(“style”),g=”@media “+a+” { #jquery-mediatest { position:absolute; } }”;h.type=”text/css”;h.styleSheet?h.styleSheet.cssText=g:h.appendChild(document.createTextNode(g));e.prepend(f).prepend(h);b[a]=d.css(“position”)===”absolute”;f.add(h).remove()}return b[a]}}()})(jQuery);(function(a,e){function b(a){var b=a.charAt(0).toUpperCase()+a.substr(1),a=(a+” “+c.join(b+” “)+b).split(” “),d;for(d in a)if(f[a[d]]!==e)return true}var d=a(“

What is the issue? Is there any way to implement it manually?