Solucionado
O Erro do *ngFor não ocorreu, não precisei importar o CommonModule, porque ocorreu isso?
import { NgModule } from "@angular/core";
import { PhotoComponent } from "./photo/photo.component"; import { HttpClientModule } from "@angular/common/http"; import { PhotoListComponent } from './photo-list/photo-list.component';
@NgModule({ declarations: [ PhotoComponent, PhotoListComponent], imports: [HttpClientModule] //importar CommonModule? })
export class PhotosModule{
}
O erro não ocorreu porque eu não havia tirado o PhotosModule do app.Module.ts
import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core';
import { AppComponent } from './app.component'; import { PhotosModule } from './photos/photos.module';
@NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, //----------> PhotosModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { }