.image-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.image-container img {
  display: block;
  width: 100%;
  height: auto;
}

.image-container .error-message {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
  background-color: rgba(0, 0, 0, 0.5);
  padding: 10px;
  border-radius: 5px;
  display: none;
}

.image-container img.error {
  display: none;
}

.image-container img.error + .error-message {
  display: block;
}