ng-4 - Cannot read property 'title' of undefined

pousada-detail-component.html

<div>
    <h1>{{pousada.title}}</h1>
    <small>{{pousada.location}}</small>
</div>

pousada-detail-component.js

import 'rxjs/add/operator/switchMap';
import { Component, OnInit } from '@angular/core';
import { ActivatedRoute, ParamMap } from '@angular/router';
import { DomSanitizer } from '@angular/platform-browser';
import { SafeUrl } from '@angular/platform-browser';
import { Pousada } from '../../services/pousada/pousada';
import { PousadaService } from '../../services/pousada/pousada.service';

@Component({
    selector: 'pousada',
    templateUrl: './pousada-detail.component.html'
})

export class PousadaDetailComponent implements OnInit {
    pousada: Pousada;
    embedParams: string;
    sanitizer: DomSanitizer;
    mapEmbedSrc: SafeUrl;

    constructor(
        private pousadaService: PousadaService,
        private route: ActivatedRoute,
        private domSanitizer: DomSanitizer
    ) {
        this.embedParams = '365m/data=!3m1!1e3';
        this.sanitizer = domSanitizer;
        this.pousada = pousadaService.getTemplate();
    }

    ngOnInit(): void {
        this.route.paramMap
            .switchMap((params: ParamMap) => this.pousadaService.getRecord(params.get('slug')))
            .subscribe(pousada => this.pousada = pousada);
    }

    renderMap(): void {
        this.mapEmbedSrc = this.sanitizer.bypassSecurityTrustResourceUrl(
            'https://www.google.com/maps/embed/v1/place?center='
            + this.pousada.lat
        );
    }
}

pousada-service.js

import { Injectable } from '@angular/core';

import { Pousada } from './pousada';
import { POUSADAS } from '../../mocks/mock-pousadas';

@Injectable()
export class PousadaService {
    getTemplate(): Pousada {
        return new Pousada();
    }

    getRecords(): Promise<Pousada[]> {
        return Promise.resolve(POUSADAS);
    }

    getRecord(slug: string): Promise<Pousada> {
        return this.getRecords()
            .then(pousadas => pousadas.find(pousada => pousada.slug == slug));
    }
}

Pousada.js

export class Pousada {
    slug: string;
    title: string;
    location: string;
    lat: string;
    long: string;
    images: {
        main: string
    };
}