title: Admob ad stuck with "You can skip this ad in 5s"
body: <p>I am using Admob for my iOS app. It has been going fine, but the full screen ad "GADInterstitial" sometimes produces a black screen with text "You can skip this ad in 5s". It stays the same with black screen and there is no option to skip. Any idea what could be the problem?</p>
  
  <p>P.S. Access to Youtube is blocked here so is that the problem if it is a video ad?</p>
  
  <p>I can see animated ads perfectly (probably gif) but sometimes this black screen gets stuck which requires minimizing the app and then switching back.</p>
  
  <p>I have simply followed the code provided <a href="https://developers.google.com/mobile-ads-sdk/docs/admob/advanced#ios" rel="nofollow noreferrer">here</a></p>
  
  <pre><code>- (void) showAd
  {
      GADInterstitial *interstitial_ = [[GADInterstitial alloc] init];
      interstitial_.adUnitID = MY_INTERSTITIAL_UNIT_ID;
      [interstitial_ loadRequest:[GADRequest request]];
  }
  
  - (void)interstitialDidReceiveAd:(GADInterstitial *)interstitial
  {
      [interstitial_ presentFromRootViewController:self];
  }
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/SaAwV.png" alt="enter image description here"> </p>