Angular不是一个已知元素：在同一模块中

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我有一个角度模块，其中包含两个组件。

第一个组件是这样定义的。

overview.component.ts

@Component({
  selector: 'app-pricing-table',
  templateUrl: './pricing-table.component.html',
  styleUrls: ['./pricing-table.component.scss']
})
export class PricingTableComponent implements OnInit {
}

在第二个组件中，我尝试使用给定的标记包括概述组件。

<app-pricing-table></app-pricing-table>

这两个组件都在同一模块中定义。

@NgModule({
  declarations: [OverviewComponent, PricingTableComponent],
  imports: [
    CommonModule,
    SubscriptionRoutingModule,
  ],
})
export class SubscriptionModule { }

When I run ng serve I get an error. I`ve restarted the development server multiple times. 

ERROR in src/app/modules/subscription/pages/overview/overview.component.html:13:1 - error NG8001: 'app-pricing-table' is not a known element:
1. If 'app-pricing-table' is an Angular component, then verify that it is part of this module.
2. If 'app-pricing-table' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.

13 <app-pricing-table></app-pricing-table>

  src/app/modules/subscription/pages/overview/overview.component.ts:5:16
    5   templateUrl: './overview.component.html',
    Error occurs in the template of component OverviewComponent.

我的模块/组件有什么问题？