Can not find a supporting object '[object Object]' of type 'object'

I'm not able to do a simple getAll in an entity. I'm using spring boot + angular 6. The spring console shows that the query is being done.

error that is appearing in the browser.

  

Can not find a supporting object '[object Object]' of type   'object'. NgFor only supports binding to Iterables such as Arrays.

My service:

    url = 'http://localhost:8080/unitys';

  constructor(
    public http: HttpClient
  ) { }

  getAll() {
    return this.http.get<Unity[]>(this.url);
  }

My component:

export class UnityListComponent implements OnInit {

   listUnitys: Unity[];

  constructor(
    private unityService: UnityService
  ) { }

  ngOnInit() {
    this.getAll();
  }


  public getAll() {
    this.unityService.getAll()
    .subscribe(data => {
      this.listUnitys = data;
    });
  }

My html:

h3 class="first">Basic</h3>
<div class="ui-g">
  <div class="ui-g-12">
    <p-table [value]="listUnitys" [responsive]="true" #tabela>
      <ng-template pTemplate="header">
        <tr>
          <th>ID</th>
          <th>DESCRIÇÃO</th>
          <th>UNIDADE</th>
        </tr>
      </ng-template>

      <ng-template pTemplate="body" let-u.data>
        <tr>
          <td>{{ u.id }}</td>
          <td>{{ u.name }}</td>
          <td>{{ u.unity }}</td>

        </tr>
      </ng-template>


    </p-table>
  </div>