Error: Invalidpipeargument: '[Object Object]' for pipe 'Slicepipe'

Question

I am developing a system, which lists logs and is doing the log listing correctly.

But there’s a mistake I don’t understand.

LogComponent.html:24 ERROR Error: InvalidPipeArgument: '[object Object]' for pipe 'SlicePipe'
    at invalidPipeArgumentError (common.js:3953)
    at SlicePipe.push../node_modules/@angular/common/fesm5/common.js.SlicePipe.transform (common.js:5317)
    at Object.eval [as updateDirectives] (LogComponent.html:24)
    at Object.debugUpdateDirectives [as updateDirectives] (core.js:10846)
    at checkAndUpdateView (core.js:10243)
    at callViewAction (core.js:10484)
    at execComponentViewsAction (core.js:10426)
    at checkAndUpdateView (core.js:10249)
    at callViewAction (core.js:10484)
    at execEmbeddedViewsAction (core.js:10447)

The class log.service.ts

export class LogService extends BaseService {

  constructor(private httpClient: HttpClient, injector: Injector) {
    super(injector);
  }

  getLogControlId(app_name: string): Observable<Log> {
    return this.httpClient.get<Log>(ConfigService.getUrlControlId() + `${app_name}`).map(response => response as Log);
  }

The class log.component.ts

export class LogComponent implements OnInit {

  public titulo: string;
  app_name: string;
  log: Log;

  constructor(
    private router: Router,
    private route: ActivatedRoute, 
    private logService: LogService) { }

  ngOnInit(): void{
    this.app_name = this.route.snapshot.params['app_name'];

    this.log = new Log();
    this.logService.getLogControlId(this.app_name).subscribe( data =>{
      this.log = data;
    });
  }

  pageSize = 20;
  page = 1;

}

The class log.component.html

<tbody>
      <tr *ngFor="let servico of log | slice: (page-1) * pageSize : (page-1) * pageSize + pageSize ">
        <!-- <tr *ngFor="let servico of log"> -->
        <th scope="row"></th>
        <td>{{ servico.nome }}</td>
        <td>{{ servico.date }}</td>
        <td>{{ servico.texto }}</td>
      </tr>
    </tbody>
  </table>

Why are you making this mistake and how can I fix it?