ngrx store freeze error

[sbkpilot1]

I am trying to implement ngrx-store-freeze@0.2.1 to our project and i'm getting this error on app startup:

ERROR Error: Uncaught (in promise): TypeError: Cannot add property _resolvedData, object is not extensible
TypeError: Cannot add property _resolvedData, object is not extensible
    at MapSubscriber.eval [as project] (router.js:3909)
    at MapSubscriber._next (map.js:79)
    at MapSubscriber.Subscriber.next (Subscriber.js:92)
    at ScalarObservable._subscribe (ScalarObservable.js:51)
    at ScalarObservable.Observable._trySubscribe (Observable.js:172)
    at ScalarObservable.Observable.subscribe (Observable.js:160)
    at MapOperator.call (map.js:57)

Any ideas? My store is configured like so:

StoreModule.forRoot(<any>{app: appReducer}, { metaReducers: metaReducers, initialState: initialState })

[kanafghan]

@sbkpilot1 are you using @ngrx/router-store and have you implemented your own custom serializer for the RouterStateSnapshot? (see https://github.com/brandonroberts/ngrx-store-freeze/blob/master/docs/docs.md#additional-documentation)

[envil]

You have to provide RouterStateSerializer:

@NgModule({
  ...
  providers: [
    { provide: RouterStateSerializer, useClass: CustomRouterStateSerializer}
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

You can find one implementation here: https://github.com/ngrx/platform/blob/master/example-app/app/shared/utils.ts

[ghost]

For anyone using @envil's answer, the link has moved with more documentation: https://github.com/ngrx/platform/blob/master/docs/router-store/api.md#custom-router-state-serializer