BannerAd doesn't show up on Android (by the default installation process) although intersititial and reward ads show without problem.

[sasavas]

I followed the installation process as depicted in the wiki and copied the code into the main.dart file.
Everything else works perfectly but banner ad does not show up although it takes space (responsively to the pressing of button "Banner Size".

And here is the output in the debug console:
D/DynamitePackage( 9571): Instantiating com.google.android.gms.ads.ChimeraAdManagerCreatorImpl
I/Ads ( 9571): This request is sent from a test device.
W/.savas.expense( 9571): Accessing hidden method Lsun/misc/Unsafe;->compareAndSwapObject(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z (greylist, linking, allowed)
W/.savas.expense( 9571): Accessing hidden method Lsun/misc/Unsafe;->getInt(Ljava/lang/Object;J)I (greylist,core-platform-api, linking, allowed)
W/.savas.expense( 9571): Accessing hidden method Lsun/misc/Unsafe;->getLong(Ljava/lang/Object;J)J (greylist,core-platform-api, linking, allowed)
E/MethodChannel#flutter/platform_views( 9571): Failed to handle method call
E/MethodChannel#flutter/platform_views( 9571): android.view.WindowManager$InvalidDisplayException: Unable to add window android.view.ViewRootImpl$W@ca52fd1 -- the specified display can not be found
E/MethodChannel#flutter/platform_views( 9571): at android.view.ViewRootImpl.setView(ViewRootImpl.java:1069)
E/MethodChannel#flutter/platform_views( 9571): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:397)
E/MethodChannel#flutter/platform_views( 9571): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:108)
E/MethodChannel#flutter/platform_views( 9571): at android.app.Dialog.show(Dialog.java:340)
E/MethodChannel#flutter/platform_views( 9571): at android.app.Presentation.show(Presentation.java:252)
E/MethodChannel#flutter/platform_views( 9571): at io.flutter.plugin.platform.VirtualDisplayController.(VirtualDisplayController.java:93)
E/MethodChannel#flutter/platform_views( 9571): at io.flutter.plugin.platform.VirtualDisplayController.create(VirtualDisplayController.java:53)
E/MethodChannel#flutter/platform_views( 9571): at io.flutter.plugin.platform.PlatformViewsController$1.createPlatformView(PlatformViewsController.java:105)
E/MethodChannel#flutter/platform_views( 9571): at io.flutter.embedding.engine.systemchannels.PlatformViewsChannel$1.create(PlatformViewsChannel.java:96)
E/MethodChannel#flutter/platform_views( 9571): at io.flutter.embedding.engine.systemchannels.PlatformViewsChannel$1.onMethodCall(PlatformViewsChannel.java:60)
E/MethodChannel#flutter/platform_views( 9571): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:231)
E/MethodChannel#flutter/platform_views( 9571): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:93)
E/MethodChannel#flutter/platform_views( 9571): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:642)
E/MethodChannel#flutter/platform_views( 9571): at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#flutter/platform_views( 9571): at android.os.MessageQueue.next(MessageQueue.java:335)
E/MethodChannel#flutter/platform_views( 9571): at android.os.Looper.loop(Looper.java:183)
E/MethodChannel#flutter/platform_views( 9571): at android.app.ActivityThread.main(ActivityThread.java:7476)
E/MethodChannel#flutter/platform_views( 9571): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#flutter/platform_views( 9571): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:549)
E/MethodChannel#flutter/platform_views( 9571): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:939)
W/.savas.expense( 9571): Accessing hidden method Lsun/misc/Unsafe;->putObject(Ljava/lang/Object;JLjava/lang/Object;)V (greylist,core-platform-api, linking, allowed)
W/.savas.expense( 9571): Accessing hidden method Lsun/misc/Unsafe;->compareAndSwapObject(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z (greylist, linking, allowed)
I/Ads ( 9571): Ad failed to load : 0
E/flutter ( 9571): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: PlatformException(error, Unable to add window android.view.ViewRootImpl$W@ca52fd1 -- the specified display can not be found, null)
E/flutter ( 9571): #0 StandardMethodCodec.decodeEnvelope
package:flutter/…/services/message_codecs.dart:569
E/flutter ( 9571): #1 MethodChannel.invokeMethod
package:flutter/…/services/platform_channel.dart:321
E/flutter ( 9571):
E/flutter ( 9571): #2 AndroidViewController._create
package:flutter/…/services/platform_views.dart:640
E/flutter ( 9571): #3 AndroidViewController.setSize
package:flutter/…/services/platform_views.dart:557
E/flutter ( 9571): #4 RenderAndroidView._sizePlatformView
package:flutter/…/rendering/platform_view.dart:174
E/flutter ( 9571): #5 RenderAndroidView.performResize
package:flutter/…/rendering/platform_view.dart:155
E/flutter ( 9571): #6 RenderObject.layout
package:flutter/…/rendering/object.dart:1703
E/flutter ( 9571): #7 RenderProxyBoxMixin.performLayout
package:flutter/…/rendering/proxy_box.dart:105

[eagerashwani]

Can you resolve this issue?
If yes, please guide us🙏