Rule Definition
In general, silently passing errors is a bad practice and can result in unexpected behavior and render more difficult finding the origin of bugs. Because of the asynchronous nature of observables returned by HttpClient service calls, arising errors from observables need to be handled by user-provided error callbacks instead of try/catch blocks.

Remediation
Ensure that you provide an error callback to the subscribe method.

Violation Code Sample

export class AppComponent {
  constructor(private http: HttpClient) {
  }
    
  getData() {
    this.http.get(this.url).subscribe(      // subscription to Observable
      (data: Config) => this.config = { ...data }
    );
    // ...
  }
}

Fixed Code Sample

export class AppComponent {
  constructor(private http: HttpClient) {
  }
    
  getData() {
    this.http.get(this.url).subscribe(      // subscription to Observable
      (data: Config) => this.config = { ...data },
        error => this.error = error         // error path
    );
    // ...
  }
}

https://angular.io/guide/http#error-handling https://angular.io/guide/observables