title: App Crashes aftter adding Admob Mediation Facebook
body: <p>I integrated Google AdMob into our app. Everything worked perfectly when I added just Admob. But then we started implementing AdMob mediation. After we added the GoogleMobileAdsMediationFacebook pod app started crashing with the following exception</p>
  <pre><code>Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[GADRequest sdkVersion]: unrecognized selector sent to class 0x10334f240'
  </code></pre>
  <p>This is what we changed while implementing the mediation
  In Podfile added the following,</p>
  <pre><code>  pod 'Google-Mobile-Ads-SDK'
    pod 'GoogleMobileAdsMediationFacebook'
  </code></pre>
  <p>When registering the admob,</p>
  <pre><code>func register() {
          GADMobileAds.sharedInstance().start(completionHandler: nil)
          let ads = GADMobileAds.sharedInstance()
          ads.start { status in
              // Optional: Log each adapter's initialization latency.
              let adapterStatuses = status.adapterStatusesByClassName
              for adapter in adapterStatuses {
                  let adapterStatus = adapter.value
                  NSLog(&quot;Adapter Name: %@, Description: %@, Latency: %f&quot;, adapter.key,
                        adapterStatus.description, adapterStatus.latency)
              }
          }
      }
  </code></pre>
  <p>The above code logs the following,</p>
  <pre><code>2021-04-08 12:55:03.428056+0600 Quran Touch[542:38566] Adapter Name: GADMediationAdapterFacebook, Description: &lt;GADAdapterStatus: 0x28158aa60; state = Not Ready;Adapter failed to initialize. Adapter raised an exception during setup. Adapter: GADMediationAdapterFacebook, Exception: +[GADRequest sdkVersion]: unrecognized selector sent to class 0x10334f240&gt;, Latency: 0.184458
  2021-04-08 12:55:03.428157+0600 Quran Touch[542:38566] Adapter Name: GADMobileAds, Description: &lt;GADAdapterStatus: 0x2815f01e0; state = Ready&gt;, Latency: 0.022223
  </code></pre>
  <p>These are the only changes that we made to integrate mediation. When loading the banner or any other ad in the view, App Crashes</p>