The `*ngFor` directive was used in the template, but neither the `NgFor` directive nor the...

I'm new to angular and I can't use the ngFor component. This is the error:

The *ngFor directive was used in the template, but neither the NgFor directive nor the CommonModule was imported. Use Angular's built-in control flow @for or make sure that either the NgFor directive or the CommonModule is included in the @Component.imports array of this component.

And this is the code:

<h2>List</h2>

<ul>
<li *ngFor="let c of contacts">
{{c.id}} - {{c.name}}
</li>
</ul>

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