I don't know if this gonna work or not 
but somehow changing the aia name worked for me, it wasn't working when the name was testing
I've fixed this error, Github Commit . You can download latest AdmobInterstitial extension from here.
Did you followed all the steps ? You can reply with that aia or if you don't want to share in public then you can DM your aia. Thankyou.
So, the error was coming when you didn't changed aia name ? 
your aia was working perfectly and I copied it into another one named test.aia and it didn't work then despite the fact that it was the same as your aia
hi thanks for your answer.
I have followed the step to create my extension.
I have just uploaded my extension, add my app unit id in banner and interest ads in the aia test.
That's all. i have built in APK and got the error.
i have also try with a VPN to show but i got the error 3 to 1 after spam click
. Without vpn i got only error 3
Since, you are clicking on your ads yourself, Admob have limited your ads. So, you should always use test ad unit id for testing purpose.
Also, I will try to add SetTestDevice method so that you can add your device as test device in new update soon.
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oh ok i understand now. thank you very much.
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It is ossum Extension But i want Facebook add extension can u pl help me for that
Hi @oseamiya , I've published my app on google play and I've activated advertising on admob.
I've selected test mode on false in the designer property and i've entered my ad unit IDs in the extensions but I'm not seeing ads.
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With Admob Rewarded it gives me "ad failed to load - building request URL error"
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With Rewarded Interstitial, I see a test advertisement.
Do you know what the problem can be?
Did you followed these steps properly? Did you added your admob ad id correctly ?
Thanks for the extension
I have a doubt that, I have used your "AdmobSdks1" extension to initiate the sdk, and as you have told I have made an extension from Niotron, The Screenshot is the code in Niotron, is this extension all right? , I have put mine extension in App Inventor but there are no block for it, I mean to initialise the SDK i have used your extension alongside that I have also put my extension in all the screens which contain ads, Is this the right way or I am doing something wrong?
The extension you create helps to add required manifest elements in your application. So, you didn't need to use the methods available in that extension. Just drag and drop the extension and it should work if you have provided correct admob app unit id.
Sorry I am a bit confused,
As I am very new in App Development, Have I done it right or I need to change something? Again Thanks.
Is the code in Niotron complete? If it is then I compiled the extension and Put it in My app, should I replace it with your Android SDK extension or use it alongside?
Did you compiled your extension successfully? If yes, then use that extension along with admob sdk extension...
If you got any error, then you can put error log here.
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Yes. It is !
Thanks for the help buddy, You solved my problem
Great Work Mate.
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Test ads were running great, but when I put the ad units id, ads were not running. Any solution?