Autocomplet JQuery widget not working on the server

Question

I have an issue with the autocomplete widget from jquery(https://jqueryui.com/autocomplete/). When I start the local development server, everything works fine, the widget works perfect, but when I pull the branch on the test server( I have a special testing server that is a copy of the main server), it's not working(and travis tests from github are failing) I don't know if is relevant or not, but I am working with Mojolicious

$(function() {
    var pages = [];
    % foreach (@$pages) {
        pages.push('<%= $_->{title} %>');
        pages.push('<%= $_->{id} %>');
    % }
    $("input[name=page_title]").autocomplete({
        source: pages,
        autoFocus: true,
        minLength: 3
      });
    });

How can I figure it out?