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Cordova build android fails after upgrading to cordova-android 11

I'm currently upgrading cordova (and its platforms) in an existing project.
After upgrading from cordova-android from 9.x to 11.x I get some build errors:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:processDebugResources'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
> Android resource linking failed
C:\Users\OBurger\.gradle\caches\transforms-3\5c55b34766402f38a5e46b43ac71f280\transformed\jetified-core-splashscreen-1.0.0\res\values-v31\values-v31.xml:3:5-9:13: AAPT: error: style attribute 'android:attr/windowSplashScreenAnimatedIcon' not found.
C:\Users\OBurger\.gradle\caches\transforms-3\5c55b34766402f38a5e46b43ac71f280\transformed\jetified-core-splashscreen-1.0.0\res\values-v31\values-v31.xml:3:5-9:13: AAPT: error: style attribute 'android:attr/windowSplashScreenBackground' not found.
C:\Users\OBurger\.gradle\caches\transforms-3\5c55b34766402f38a5e46b43ac71f280\transformed\jetified-core-splashscreen-1.0.0\res\values-v31\values-v31.xml:3:5-9:13: AAPT: error: style attribute 'android:attr/windowSplashScreenAnimationDuration' not found.
C:\Users\OBurger\.gradle\caches\transforms-3\5c55b34766402f38a5e46b43ac71f280\transformed\jetified-core-splashscreen-1.0.0\res\values-v31\values-v31.xml:10:5-14:13: AAPT: error: style attribute 'android:attr/windowSplashScreenIconBackgroundColor' not found.
C:\Users\OBurger\.gradle\caches\transforms-3\4e55571a2aca20a3df79838283759989\transformed\core-1.7.0\res\values\values.xml:105:5-114:25: AAPT: error: resource android:attr/lStar not found.
I already followed the steps for the cordova-android upgrade described here: https://ionic.zendesk.com/hc/en-us/articles/7891143965975-Migrating-to-Cordova-Android-11
I also added a dependency for "androidx.core:core-splashscreen:1.0.0" in build.gradle

How to fix : Execution failed for task ':app:processDebugResources'

I'm currently working with Cordova CLI along with Android cmdline-tools, and I'm getting this error when I run cordova build to generate apk.
Execution failed for task ':app:processDebugResources'.
A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
Android resource linking failed
/home/user/.gradle/caches/transforms-2/files-2.1/1723263284390e5d17b6b8ac539aa999/core-1.7.0/res/values/values.xml:105:5-114:25: AAPT:
error: resource android:attr/lStar not found.
A couple of days ago was working perfectly but I just can't spot the issue.
What's happening ?
I'm still troubleshooting with this.
Any help is hugely appreciated.

the issue is in values.xml file where you have defined android:attr/lStar .
the resource directory is not able to find resource with the same so that the resource can not be found.
You can use this example for further reference.
A failure occurred while executing com.android.build.gradle.internal.tasks

Flutter: Execution failed for task ':background_location:verifyReleaseResources'

My app works fine when I run it or build app packages, but when I try to build apk for release or profile, it gives this message:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':background_location:verifyReleaseResources'.
> A failure occurred while executing com.android.build.gradle.tasks.VerifyLibraryResourcesTask$Action
> Android resource linking failed
ERROR:C:\Users\Misha\AppData\Local\Pub\Cache\hosted\pub.dartlang.org\background_location-0.6.1\android\src\main\AndroidManifest.xml:10:9-15:37: AAPT: error: attribute android:foregroundServiceType not found.
I've already tried flutter clean and flutter pub cache repair, as well as updated my Gradle version. Also, I have AndroidX enabled.
Could somebody please help?
Update: I found a solution here

Getting Task :react-native-custom-keyboard-kit:verifyReleaseResources FAILED when building app

I am trying to create a simple app with Custom Keyboard. So I used react-native-custom-keyboard-kit npm package. It has no error when the app running on debugging mode. But when I tried to build app, it occured error as below:
Task :react-native-custom-keyboard-kit:verifyReleaseResources FAILED
FAILURE: Build failed with an exception.
What went wrong:
Execution failed for task ':react-native-custom-keyboard-kit:verifyReleaseResources'.
A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
Android resource linking failed
/home/bipulroy/.gradle/caches/transforms-2/files-2.1/a4aa75ad6ccbe3ab81ae94031ca63766/appcompat-1.0.2/res/values-v26/values-v26.xml:5:5-8:13: AAPT: error: resource android:attr/colorError not found.

Have you linked the library natively?
Try this:
react-native link react-native-custom-keyboard-kit

flutter build apk --split-per-abi fails

Helllo I get this erros when I run flutter build apk --split-per-abi
I can't generate my apk. Can you help me please. thank you in advance.
FAILURE: Build failed with an exception.
What went wrong:
Execution failed for task ':moneytextformfield:verifyReleaseResources'
> A failure occurred while executing
com.android.build.gradle.internal.tasks.Workers$ActionFacade
> Android resource linking failed
C:\Users\bahal\.gradle\caches\transforms-2\files-
2.1\c82bf40584b9a53c31dba07a8a48f301\core-1.1.0\res\values\values.xml:142:5-
173:25: AAPT: erro
r: resource android:attr/fontVariationSettings not found.
C:\Users\
----------
bahal\.gradle\caches\transforms-2\files-
2.1\c82bf40584b9a53c31dba07a8a48f301\core-1.1.0\res\values\values.xml:142:5-
173:25: AAPT: erro
r: resource android:attr/ttcIndex not found.

I resolved the problem by removing the money textformfield dependency. Now I'm using the simple textFormField