Estou fazendo um teste com Angular 6 e Ag-Grid. Eu fiz um exemplo e ele pinta, quero dizer o CSS e assim por diant

Mas, seguindo o exemplo abaixo e inserindo os dados reais do meu back-end, não pinta a tabela e sai o tempo todo "carregando"

// package.json

"dependencies": {
  "ag-grid-angular": "^19.0.0",
  "ag-grid-community": "^19.0.0",

// HTML

<div class="container-fluid">
 Competencias
</div>
<div class="jumbotron text-center">
<ag-grid-angular #agGrid style="width: 100%; height: 200px;" class="ag-theme-balham" [gridOptions]="gridOptions">
 </ag-grid-angular>  
</div>

// COMPONENTE

import { Component, OnInit } from '@angular/core';
import { environment } from '@env/environment';
import { CompetenceService } from '@app/services/competence.service';
import { GridOptions } from 'ag-grid-community';

@Component({
 selector: 'app-competence',
 templateUrl: './competence.component.html',
 styleUrls: ['./competence.component.scss'],
 providers: [CompetenceService],
})
export class CompetenceComponent implements OnInit {
version: string = environment.version;
title = 'app';
rowData: any;
columnDefs: any;
competences: any[];
gridOptions: GridOptions;

constructor(private competenceService: CompetenceService) { }

ngOnInit() {

this.gridOptions = <GridOptions>{};
this.gridOptions.columnDefs = new Array;
this.gridOptions.columnDefs = [
  {
    headerName: 'ID',
    field: 'id',
    width: 100
  },
  {
    headerName: 'Nombre',
    field: 'name',
    width: 200
  }];

this.competenceService.competences().subscribe(response => {
  this.competences = response;
  this.gridOptions.rowData = new Array;
  this.competences.forEach((competence) => {
    this.gridOptions.rowData.push({
      id: competence.id, name: competence.desc
    });
  });
  console.log(this.gridOptions);
});
}
}