Ad Load Errors

public void OnAdFailedToLoad(LoadAdError error)
{
    // Gets the domain from which the error came.
    string domain = error.GetDomain();

    // Gets the error code. See
    // https://developers.google.com/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 = error.GetCode();

   // Gets an error message.
   // For example "Account not approved yet". See
   // https://support.google.com/admob/answer/9905175 for explanations of
   // common errors.
   string message = error.GetMessage();

   // Gets the cause of the error, if available.
   AdError underlyingError = error.GetCause();

   // All of this information is available via the error's toString() method.
   Debug.Log("Load error string: " + error.ToString());

   // Get response information, which may include results of mediation requests.
   ResponseInfo responseInfo = error.GetResponseInfo();
   Debug.Log("Response info: " + responseInfo.ToString());
}