How to solve TypeScript error?

Question

JavaScript

In the "saveExpense" method, when passing error handling "catchError(this.errorHandlerService.handleError)", this method is highlighted and the error is displayed: Argument type (error:HttpErrorResponse)=>Observable is not assignable to parameter type (err:any, caught:Observable )=> never . How to decide?

saveExpense(userid, oExpense): Observable<any> {
        const httpOptions = {
            headers: new HttpHeaders({
                'Content-Type': 'application/json',
                'Authorization': `${this.jwtToken}`
            })
        };
        return this.http.post(`http://localhost:5555/api/expense/${userid}`, JSON.stringify(oExpense), httpOptions).pipe(
            tap(
                (response: any) => console.log(response)
            ),
            catchError(this.errorHandlerService.handleError)
        );
    }

export class ErrorHandlerService {

    handleError(error: HttpErrorResponse) {
        console.error(error);
        return throwError(error.error || 'Server error');
    }
}
}

Answer 1

catchError accepts a function like (err:any, caught:Observable)=> never
And you are trying to pass (error: HttpErrorResponse)

Answer 2

The compiler already shows you an error, but you can't read