Getting error: StaticInjectorError(Platform: core)[InjectionToken ToastConfig] in angular 8

core.js:4002 ERROR Error: Uncaught (in promise): NullInjectorError: StaticInjectorError(AppModule)[InjectionToken ToastConfig]:
StaticInjectorError(Platform: core)[InjectionToken ToastConfig]:
NullInjectorError: No provider for InjectionToken ToastConfig!
NullInjectorError: StaticInjectorError(AppModule)[InjectionToken ToastConfig]:
StaticInjectorError(Platform: core)[InjectionToken ToastConfig]:

Once I import it in the App Module:

import { ToastrModule } from 'ngx-toastr';

ToastrModule.forRoot({
      timeOut: 5000,
      positionClass: 'toast-bottom-center',
      preventDuplicates: true,
      closeButton: true,
      progressBar: true,
      maxOpened: 1,
      autoDismiss: true,
      enableHtml: true
    }),