I'm having problems integrating with admob by ionic. I built two ads within admob, one banner, and the other is video reward. But I can only display the banner, the functions are exactly identical, but only the banner is loaded. As it is the first time that I am dealing with this type of integration, I would like to know if anyone can help, you already had the same problem.

HTML:

<ion-content padding>
  <h6 class="total-premios">Total de Prêmios : R$ 50,00</h6>
  <ion-card>
      <img src="../../assets/imgs/admob.png"/>
      <ion-card-content>
        <p class="anuncio-valor">Admob : 0,03</p>
        <button ion-button color="primary" (click)="video()">video</button>
        <button ion-button color="primary" (click)="banner()">banner</button>
      </ion-card-content>
  </ion-card>

TS:

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { AdMobFree, AdMobFreeRewardVideoConfig, AdMobFreeBannerConfig } from '@ionic-native/admob-free';
import { Platform } from 'ionic-angular';

@IonicPage()
@Component({
  selector: 'page-principal',
  templateUrl: 'principal.html',
})
export class PrincipalPage {



  constructor(private admob: AdMobFree) { }

   video(){
        const videoConfig: AdMobFreeRewardVideoConfig = {
        id: 'ca-app-pub-8000726989219599/4319074413',
        isTesting: true,
        autoShow: true
        };
            this.admob.rewardVideo.config(videoConfig);

            this.admob.rewardVideo.prepare()
            .then(() => {
                this.admob.rewardVideo.show();
                console.log("deu certo");
            })
        .catch((e) =>{
            console.log("o erro foi : " +e);
        });    
    }     

    banner(){
      const bannerConfig: AdMobFreeBannerConfig = {
          id: 'ca-app-pub-8000726989219599/6127281425',
          isTesting: true,
          autoShow: true
      };
      this.admob.banner.config(bannerConfig);

      this.admob.banner.prepare()
      .then(() => {
          this.admob.banner.show();
          console.log("o banner deve aparecer aqui");
      })
      .catch(e => console.log(e));    
    }   


  ionViewDidLoad() {
    console.log('ionViewDidLoad PrincipalPage');
  }

}