1 - Na linha do import: Minha IDE exige que seja aspas simples 2 - Na linha @Component: Component 'PhotoComponent' is not included in a module and will not be available inside a template. Consider adding it to a NgModule declaration 3 - No selector: A IDE exige que o prefixo seja app
import { Component } from '@angular/core';
@Component({
selector: 'ap-photo',
templateUrl: 'photo.component.html'
})
export class PhotoComponent {
description = 'leao';
url = 'http://adnerscarpelini.com.br/wp-content/uploads/2018/07/P21-00-750x340.png';
}