It happen at the first I do compile my project.

The problem showing this:

```
 Module '".../node_modules/@angular/fire/firestore/angular-fire-firestore"' has no exported member 'FirestoreSettingsToken'

```

my **app.module.ts** file:

```
import { NgModule } from '@angular/core';

...

import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';
import { AngularFireModule } from '@angular/fire';
import { environment } from '../environments/environment';
import { AngularFirestoreModule, FirestoreSettingsToken } from '@angular/fire/firestore';

@NgModule({
  declarations: [AppComponent],
  entryComponents: [],
  imports: [
...
    AngularFireModule.initializeApp(environment.firebaseConfig),
      AngularFirestoreModule,
  ],

```

With providers:

```
{provide: FirestoreSettingsToken, useValue: { }}

```

My tools:

```
Firestore: 8.0.2
Angular, Firebase, npm: 6.13.4

```