Problem with google mobile ads errors(make the app exit )

Bug report

Problem with Google mobile ads when i add Bannerad i get error 2 as you see in the picture below :

and i have a good connection .

Code screenshots

then i wanted to use Intertialad and Rewardedvideoad but when i click on button for exemple to see the ads the app exit and i lose connection to device as you can see in the picture below:

so This is my initstate :

my main.dart:

What i tried : flutter clean upgrade flutter upgrade android studio open new project upgrade gradle to latest version nothing happen … looking for solution thanks .

Flutter doctor

[√] Flutter (Channel stable, 2.0.4, on Microsoft Windows [Version 10.0.18363.1500], locale en-US)
    • Flutter version 2.0.4 at D:\src\flutter
    • Framework revision b1395592de (2 weeks ago), 2021-04-01 14:25:01 -0700
    • Engine revision 2dce47073a
    • Dart version 2.12.2

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at D:\everythingAndroid\Android_SDK
    • Platform android-30, build-tools 30.0.3
    • ANDROID_SDK_ROOT = D:\everythingAndroid\Android_SDK
    • Java binary at: D:\AndroidStudio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Android Studio (version 4.1.0)
    • Android Studio at D:\AndroidStudio
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[√] Connected device (2 available)
    • Chrome (web) • chrome • web-javascript • Google Chrome 89.0.4389.128
    • Edge (web)   • edge   • web-javascript • Microsoft Edge 89.0.774.63

• No issues found!

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[dsdsharma]

I am having the same issue with interstitial ads, banner ads are working fine but when i try to load interstitial ad it crashes the app. I am getting an error log like this

[github-actions[bot]]

Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now. If you find this problem please file a new issue with the same description, what happens, logs and the output of ‘flutter doctor -v’. All system setups can be slightly different so it’s always better to open new issues and reference the related ones. Thanks for your contribution.