Accediendo a /tags?

Try adding this to your customize > css/html > in the </body> area

<script>
  Discourse.ExternalNavItem = Discourse.NavItem.extend({
    href : function() {
      return this.get('href');
    }.property('href')
  });

  I18n.translations.en.js.filters.tags = { title: "Tags", help: "View all Tags" };

  Discourse.NavItem.reopenClass({
    buildList : function(category, args) {
      var list = this._super(category, args);
      if(!category) {
        list.push(Discourse.ExternalNavItem.create({href: '/tags', name: 'tags'}));
      }
      return list;
    }
  });
</script>