Implementing admob in xamarin android throws Java.Lang.RuntimeException

I'm creating an android application with xamarin and want to add ads using admob, I have already registered and created a banner unit so I have an app id and an ad id. I have implemented everything according to some guides but after I want to run it on my device it throws the following exception:

Java.Lang.RuntimeException
Message=Unable to get provider com.google.android.gms.ads.MobileAdsInitProvider: java.lang.IllegalStateException: 

******************************************************************************
* The Google Mobile Ads SDK was initialized incorrectly. AdMob publishers    *
* should follow the instructions here: googl link to add a valid  *
* App ID inside the AndroidManifest. Google Ad Manager publishers should     *
* follow instructions here: googl link.                           *
******************************************************************************

Here is the relevant part of my AndroidManifest.xml:

<meta-data android:name="com.google.android.gms.ads.APPLICATION_ID" 
               android:value="ca-app-pub-myappid"/> <!-- I have my actual app id here -->
    <activity android:name="com.google.android.gms.ads.AdActivity" 
              android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" 
              android:exported="false" 
              android:theme="@android:style/Theme.Translucent" />
    <provider android:name="com.google.android.gms.ads.MobileAdsInitProvider" 
              android:authorities="com.companyname.tapitmate.mobileadsinitprovider" 
              android:exported="false" 
              android:initOrder="100" />
    <meta-data android:name="com.google.android.gms.version" 
               android:value="@integer/google_play_services_version" />

This is my adview class:

public class AdControlView : View
{
}

This is my view renderer:

public class AdViewRenderer : ViewRenderer<AdControlView, AdView>
    {
        //This is the test id according to the documentation
        private readonly string _adUnitId = "ca-app-pub-3940256099942544/6300978111";
        private readonly AdSize _adSize = AdSize.SmartBanner;
        private AdView _adView;

        public AdViewRenderer(Context context) : base(context)
        {
        }

        AdView CreateAdView()
        {
            if (_adView != null)
                return _adView;
            _adView = new AdView(Context);
            _adView.AdSize = _adSize;
            _adView.AdUnitId = _adUnitId;
            var adParams = new LinearLayout.LayoutParams(LayoutParams.WrapContent, LayoutParams.WrapContent);
            _adView.LayoutParameters = adParams;
            _adView.LoadAd(new AdRequest.Builder().Build());
            return _adView;
        }

        protected override void OnElementChanged(ElementChangedEventArgs<AdControlView> e)
        {
            base.OnElementChanged(e);
            if (Control is null)
            {
                CreateAdView();
                SetNativeControl(_adView);
            }
        }
    }

And here is my main activity:

protected override void OnCreate(Bundle savedInstanceState)
        {
            TabLayoutResource = Resource.Layout.Tabbar;
            ToolbarResource = Resource.Layout.Toolbar;
            RequestedOrientation = ScreenOrientation.Portrait;

            base.OnCreate(savedInstanceState);

            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
            MobileAds.Initialize(ApplicationContext);// I have tried both ways, same exception.
            //MobileAds.Initialize(ApplicationContext, "myactualappid");
            LoadApplication(new App());

I'm using:

• Xamarin.Essentials 1.5.1
• Xamarin.Forms 4.5.0.396
• Xamarin.GooglePlayServices.Ads 71.1720.1

What am I doing wrong? Please help. }