Split Pane + Template super

Ionic Framework ionic-v3
1

Hi, I added the Split Pane component to the super template.
This is how the tutorial look (link). This is my MainApp template:

<ion-split-pane when="xl">
  <ion-menu [content]="content">
    <ion-header>
      <ion-toolbar>
        <ion-title>Title</ion-title>
      </ion-toolbar>
    </ion-header>

    <ion-content>
      <ion-list>
        <button menuClose ion-item *ngFor="let p of pages" (click)="openPage(p)">
          {{p.title}}
        </button>
      </ion-list>
    </ion-content>
  </ion-menu>
  
  <ion-nav #content main [root]="rootPage"></ion-nav>
</ion-split-pane>

What I’m doing wrong?
Thanks!