Buenas, en la consola me aparece un error “GET file:///C:/Users/Paty/Desktop/Consumoapi/undefined net::ERR_FILE_NOT_FOUND” noto que desap...

Buenas, en la consola me aparece un error “GET file:///C:/Users/Paty/Desktop/Consumoapi/undefined net::ERR_FILE_NOT_FOUND”

noto que desaparece cuando borro !==200 del segundo if pero eso hace que no me carguen las fotos en favoritos. Dejo mi codigo:

const API_URL_RANDOM = 'https://api.thedogapi.com/v1/images/search?limit=5&api_key=f507052c-c225-41b9-b06a-722c432305aa';
const API_URL_FAVORITES = 'https://api.thedogapi.com/v1/favourites?limit=5&api_key=f507052c-c225-41b9-b06a-722c432305aa';

const spanError = document.getElementById('error')

async function loadRandomDogs() {
  const res = await fetch(API_URL_RANDOM);
  const data = await res.json();
  console.log('Random')
  console.log(data)

  if (res.status !== 200) {
    spanError.innerHTML = "Hubo un error: " + res.status;
  } else {
    const img1 = document.getElementById('img1');
    const img2 = document.getElementById('img2');
    const img3 = document.getElementById('img3');
    const btn1 = document.getElementById('btn1');
    const btn2 = document.getElementById('btn2');
    const btn3 = document.getElementById('btn3');
  
  img1.src = data[0].url;
  img2.src = data[1].url;
  img3.src = data[2].url;

  btn1.onclick = () => saveFavouriteDogs(data[0].id);
  btn2.onclick = () => saveFavouriteDogs(data[1].id);
  btn3.onclick = () => saveFavouriteDogs(data[2].id);
  }
}

async function loadFavouriteDogs() {
  const res = await fetch(API_URL_FAVORITES);
  const data = await res.json();
  console.log('Favoritos')
  console.log(data)

  
  if (res.status !== 200) {
    spanError.innerHTML = "Hubo un error: " + res.status;
  }  else {
    data.forEach(puppy => {
      const section = document.getElementById('favoritesPuppy')
      const article = document.createElement('article');
      const img = document.createElement('img');
      const btn = document.createElement('button');
      const btnText = document.createTextNode('Sacar al Puppy de favoritos');

      img.src = puppy.image.url;
      img.width = 150;
      btn.appendChild(btnText);
      article.appendChild(img);
      article.appendChild(btn);
      section.appendChild(article);

      
    });
  }

}

async function saveFavouriteDogs(id) {
  const res = await fetch(API_URL_FAVORITES, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      image_id: id
    }),
  });
  const data = await res.json();

  console.log('Save')
  console.log(res)

  if (res.status !== 200) {
    spanError.innerHTML = "Hubo un error" + res.status + data.message;
  }
}

loadRandomDogs();
loadFavouriteDogs();