Admin Approval error

I don’t know what’s wrong …
this what I want to accomplish
in segment 1 : all jobs with "status " true
in segment 2 : all jobs with “status” false (requests)
but it gives me this error , what’s the problem ?
--------- tab1.page.ts--------------------------------------

        export class Tab1Page implements OnInit {
        private loading: any;
        public jobs = new Array<Job>();
        public requests = new Array<Job>();


        private jobsSubscription: Subscription;

        nbr : string;

        constructor(
          private loadingCtrl: LoadingController,
          private jobService: JobService,
          private toastCtrl: ToastController,
          public afa: AngularFirestore,
          public afAuth: AngularFireAuth
        ) {
          this.jobsSubscription = this.jobService.getJobs().subscribe(data => {
            this.jobs = data;
          });
          
          
        }


        ngOnInit() { 
        this.nbr = '1';
        
        }

        ngOnDestroy() {
          this.jobsSubscription.unsubscribe();
        }

        

        async presentLoading() {
          this.loading = await this.loadingCtrl.create({ message: 'Attend SVP...' });
          return this.loading.present();
        }

        async deleteJob(id: string) {
          try {
            await this.jobService.deleteJob(id);
          } catch (error) {
            this.presentToast('Erreur lors de la tentative de suppression');
          }
        }

        async presentToast(message: string) {
          const toast = await this.toastCtrl.create({ message, duration: 2000 });
          toast.present();
        }

          
        async approveJob(id: string){

          this.jobService.approveJob();
          }}

------------------------ tab1.page.html------------------------------------------

                    <div [ngSwitch]="nbr">
                    <ion-list  *ngSwitchCase="'1'" > 
                    <ion-item-sliding *ngFor="let job of jobs">
                    <ion-item button [routerLink]="['/travail', job.id]">
                      <ion-avatar slot="start">
                        <img [src]="job.picture">
                      </ion-avatar>
              
                      <ion-label>
                        {{ job.title }}
                        <p>{{ job.description }}</p>
                        <p>{{ job.createdAt | date: 'short' }}</p>
                      </ion-label>
              
                    </ion-item>
              
                    <!--
                                <ion-note color="primary" slot="end" *ngIf="product.price">{{ product.price | currency: 'BRL' }}</ion-note>
            -->
            <ion-item-options side="end">
                <ion-item-option color="danger" (click)="deleteJob(job.id)">
                  <ion-icon slot="top" name="trash"></ion-icon>
                  Supprimer
                </ion-item-option>
              </ion-item-options>
                  </ion-item-sliding>
                </ion-list>
                <ion-list *ngSwitchCase="'2'">
                  <ion-item-sliding *ngFor="let request of requests">
                    <ion-item button [routerLink]="['/travail', job.id]">
                      <ion-avatar slot="start">
                        <img [src]="job.picture">
                      </ion-avatar>
              
                      <ion-label>
                        {{ job.title }}
                        <p>{{ job.description }}</p>
                        <p>{{ job.createdAt | date: 'short' }}</p>
                      </ion-label>
              
                    </ion-item>
              
                    <!--
                                <ion-note color="primary" slot="end" *ngIf="product.price">{{ product.price | currency: 'BRL' }}</ion-note>
            -->
            <ion-item-options side="end">
                <ion-item-option color="danger" (click)="deleteJob(job.id)">
                  <ion-icon slot="top" name="trash"></ion-icon>
                  Supprimer
                </ion-item-option>
                <ion-item-option color="tertiary" (click)="approveJob()" expandable>
                  Approver
                </ion-item-option>
              </ion-item-options>
                  </ion-item-sliding>

                  </ion-list>
                  </div>

----------------------job.service.ts------------------------------------

          constructor(private afs: AngularFirestore,    private activatedRoute: ActivatedRoute,
              ) {
              this.jobsCollection = this.afs.collection<Job>('Jobs',ref => ref.where("status", "==", true).orderBy("createdAt", "desc"));

            }


            getRequests(){
              this.jobsCollection = this.afs.collection<Job>('Jobs',ref => ref.where("status", "==", false).orderBy("createdAt", "desc"));

              return this.jobsCollection.snapshotChanges().pipe(
                map(actions => {
                  return actions.map(a => {
                    const data = a.payload.doc.data();
                    const id = a.payload.doc.id;

                    return { id, ...data };
                  });
                })
              );

            }

            getJobs() {
              return this.jobsCollection.snapshotChanges().pipe(
                map(actions => {
                  return actions.map(a => {
                    const data = a.payload.doc.data();
                    const id = a.payload.doc.id;

                    return { id, ...data };
                  });
                })
              );
            }

            addJob(job: Job) {
              return this.jobsCollection.add(job);
            }

            getJob(id: string) {
              return this.jobsCollection.doc<Job>(id).valueChanges();
            }

            updateJob(id: string, job: Job) {
              return this.jobsCollection.doc<Job>(id).update(job);
            }

            deleteJob(id: string) {
              return this.jobsCollection.doc(id).delete();
            }
            approveJob(){
              this.jobID = this.activatedRoute.snapshot.params['id'];

              this.afs.doc(`Jobs/${this.jobID}`).update({
                status : true
            })
              }
          }