Why can not I print the result of a query in angle 6?

My code is as follows:

getReport(id_reporte: string, destino: number, departamento: string,
      afiliacion: string, tipo_servicio: string, canal: string,
      fechai: string, fechaf: string, por: string): Observable <Afiliados[]> {

  return this.http.post<Afiliados[]>(
    this.url, JSON.stringify(
    {
      'id_reporte': id_reporte,
      'destino': destino
    }),
    httpOptions);
}

My interface that I receive:

export interface Afiliados {
    Nombre: string, 
    Email: string
}

My invocation of the method:

this.RAfiliados.getReport(this.id , 2, '' , '' , '' , '' , '20170616' , '20180719' , '' )
    .subscribe(data => this.ARAfiliados = data);

At the time of touring the arrangement:

<tr *ngFor="let afiliados of ARAfiliados">
    <td>{{afiliados.Nombre}}</td><td>{{afiliados.Email}}</td>
</tr>

My answer json:

        [
            {
                "nombre": " ejemplo ",
                "email": "[email protected] "
            },
            {
                "nombre": " ejemplo ",
                "email": "[email protected] "
            }
        ]

But at the time of seeing the result, it shows me the total size of my answer but I do not separate the information in the table.