<br />

When an ad fails to load, a failure callback is called which provides a
`LoadAdError` object.

The following code snippet retrieves error information when a rewarded ad fails
to load:

```dart
onAdFailedToLoad: (ad, loadAdError) {
  // Gets the domain from which the error came.
  String domain = loadAdError.domain;

  // Gets the error code. See
  // https://developers.google.com/admob/android/reference/com/google/android/gms/ads/AdRequest
  // and https://developers.google.com/admob/ios/api/reference/Enums/GADErrorCode
  // for a list of possible codes.
  int code = loadAdError.code;

  // A log friendly string summarizing the error.
  String message = loadAdError.message;

  // Get response information, which may include results of mediation requests.
  ResponseInfo? responseInfo = loadAdError.responseInfo;
}
```

This information can be used to more accurately determine what caused the ad
load to fail. In particular, for errors under the domain `com.google.admob` on
iOS and `com.google.android.gms.ads` on Android, the `GetMessage()` can be
looked up in [this help center
article](https://support.google.com/admob/answer/9905175) for a more detailed
explanation and possible actions that can be taken to resolve the issue.