onAdFailedToLoad - Error Code 5

[rochapablo]

What does this error (5) means?

Could that be kgaderrortimeout?

Trying to run on iOS simulator.

return DFPBanner(
      isDevelop: false,
      adUnitId: '***',
      adSize: DFPAdSize.BANNER,
      onAdLoaded: () {
        print('Banner onAdLoaded');
      },
      onAdFailedToLoad: (errorCode) {
        print('Banner onAdFailedToLoad: errorCode: $errorCode');
      },
      onAdOpened: () {
        print('Banner onAdOpened');
      },
      onAdClosed: () {
        print('Banner onAdClosed');
      },
      onAdLeftApplication: () {
        print('Banner onAdLeftApplication');
      },
    );