javascript - 错误类型错误：无法读取未定义的 Angular 8 ngx-toastr 的属性“成功”

Question

正如我"ngx-toastr": "^11.3.3"在我的package.json中使用并在我的app.module.ts中导入的那样。

imports: [
    AgmCoreModule.forRoot({ apiKey: 'AIzaSyC5gJ5x8Yw7qP_DqvNq3IdZi2WUSiDjskk' }),
    BrowserAnimationsModule,
    BrowserModule,
    ToastrModule.forRoot({
      timeOut: 1000,
      positionClass: 'toast-bottom-right'
    }),
]

在我的CompanyProfile.service.ts文件中，我使用了如下代码。

     import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { BehaviorSubject, Observable, Subject } from 'rxjs';
import { CustomerProfile } from '../_models/CustomerProfile';
import { CustomerUser } from '../_models/CustomerUser';
import { ToastrService } from 'ngx-toastr';

@Injectable({
  providedIn: 'root'
})
export class CustomerProfileService {

  private messageCustomerProfileSource: BehaviorSubject<CustomerProfile>;
  public currentCustomerProfileMessage: Observable<CustomerProfile>;

  constructor(private http: HttpClient, private toastr: ToastrService) {
    this.messageCustomerProfileSource = new BehaviorSubject<CustomerProfile>(new CustomerProfile());
    this.currentCustomerProfileMessage = this.messageCustomerProfileSource.asObservable();
  }

  CustomerUserAdd(_CustomerUser: CustomerUser, UserLogo: File) {
    const fData = new FormData();
    fData.append('Id', _CustomerUser.Id == null ? '' : _CustomerUser.Id.toString());
    fData.append('CustomerId', _CustomerUser.CompanyId.toString());
    fData.append('FirstName', _CustomerUser.FirstName);
    fData.append('LastName', _CustomerUser.LastName);

    if (UserLogo != null) {
      fData.append('FileUpload', UserLogo, UserLogo.name);
    }
    const hdrs = new HttpHeaders().append('Content-Disposition', 'mulipart/form-data');
    this.http.post(`CompanyProfile/RegisterCustomerUsers`, fData, { headers: hdrs })
      .subscribe(this.Success, this.Error);    
  }

  UpdateUsersPermissions(Id: number, Type: string, IsActive: boolean) {
    const fData = new FormData();
    fData.append('Id', Id.toString());
    fData.append('Type', Type);
    fData.append('IsActive', IsActive.toString());
    this.http.post(`CompanyProfile/UpdateUsersPermissions`, fData)
      .subscribe(this.Success, this.Error);
  }

  Error(data) {
    this.toastr.error(data.errorMessage, 'Error !');
  }
  Success(data) {
    this.toastr.success(data.errorMessage, 'Success !');
    location.href = "/#/CustomerUsers";
  }
}

因为它显示了以下错误，它没有按预期工作，而且我也需要location.href = "/#/CustomerUsers"在 toastr 成功中添加。