cannot find symbol BuildConfig FlutterFirebaseCoreRegistrar

I updated a 2 year old flutter-project and get the following error at debugging. I need help. I tried to fix the error for 4 days.

Launching lib/main.dart on sdk gphone x86 in debug mode…
/Users/michael/.pub-cache/hosted/pub.dev/firebase_core-2.24.2/android/src/main/java/io/flutter/plugins/firebase/core/FlutterFirebaseCoreRegistrar.java:19:
error: cannot find symbol
LibraryVersionComponent.create(BuildConfig.LIBRARY_NAME, BuildConfig.LIBRARY_VERSION));
^
symbol: variable BuildConfig
location: class FlutterFirebaseCoreRegistrar

Another new created flutter project could be run. I tried with gradle 7.5 and Gradle 8. Both show the mentioned error.

My Flutter doctor

[✓] Flutter (Channel stable, 3.16.1, on macOS 14.1.1 23B81 darwin-x64, locale de-DE)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 15.0.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2022.3)
[✓] VS Code (version 1.84.2)
[✓] VS Code (version 1.48.2)

My build.gradle (project)

 buildscript {
     // 202306 BEFORE '1.7.10' AFTER '1.9.21'
     ext.kotlin_version = '1.9.21'
     repositories {
         google()
         jcenter()
     }
 
 
  dependencies {
         // classpath 'com.android.tools.build:gradle:3.5.0'
         classpath 'com.android.tools.build:gradle:8.1.4'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         // 202306 BEFORE 4.3.10 AFTER 4.4.0
         classpath 'com.google.gms:google-services:4.4.0'
     }
 
 }
 
 // 202306 
 subprojects{
     afterEvaluate {
         android {
             namespace 'com.example.camflo'
         }
     } }
 
 allprojects {
     repositories {
         google()
         jcenter()
     } }
 
 rootProject.buildDir = '../build' subprojects {
     project.buildDir = "${rootProject.buildDir}/${project.name}" } subprojects {
     project.evaluationDependsOn(':app') }
 
 tasks.register("clean", Delete) {
     delete rootProject.buildDir }

My build.gradle app:

 def localProperties = new Properties() def localPropertiesFile =
 rootProject.file('local.properties') if (localPropertiesFile.exists())
 {
     localPropertiesFile.withReader('UTF-8') { reader ->
         localProperties.load(reader)
     } }
 
 def flutterRoot = localProperties.getProperty('flutter.sdk') if
 (flutterRoot == null) {
     throw GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.") }
 
 def flutterVersionCode =
 localProperties.getProperty('flutter.versionCode') if
 (flutterVersionCode == null) {
     flutterVersionCode = '1' }
 
 def flutterVersionName =
 localProperties.getProperty('flutter.versionName') if
 (flutterVersionName == null) {
     flutterVersionName = '1.0' }
 
 apply plugin: 'com.android.application' apply plugin: 'kotlin-android'
 apply plugin: 'com.google.gms.google-services' apply from:
 "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
     // compileSdkVersion 28
     compileSdkVersion 33
 
     namespace = "com.example.camflo"
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
 
     // 202306 added buildFeatures and buildConfig with no change of error
     // buildFeatures {
     //    buildConfig = true
     // }
 
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.camflo.app"
         minSdkVersion 29
         // minSdkVersion 30
         // targetSdkVersion 28
         targetSdkVersion 33
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }
 
     buildTypes {
         release {
             // TODO: Add your own signing config for the release build.
             // Signing with the debug keys for now, so `flutter run --release` works.
             signingConfig signingConfigs.debug
         }
     }
     lint {
         disable 'InvalidPackage'
     } }
 
 flutter {
     source '../..' }
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'com.google.firebase:firebase-analytics:17.5.0' }

My dependencies:

environment:
  sdk: ">=2.12.0 <=4.0.0"

dependency_overrides:
  package_info_plus: ^4.2.0
  http: ^1.1.2

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter
 
  shared_preferences: "2.2.2"
  platform: ^3.1.3 
  firebase_core: ^2.24.2
  firebase_analytics: ^10.7.1
  firebase_auth: ^4.14.1
  firebase_storage: ^11.5.2
  cloud_firestore: ^4.13.2
  provider: ^6.1.1
  image_picker: ^1.0.4
  timeago: ^3.6.0
  flutter_spinkit: ^5.2.0
  geolocator: ^10.1.0
  uuid: ^4.2.1
  image: ^4.1.3
  animator: ^3.3.0
  http: ^0.13.0
  path_provider: ^2.0.1
  firebase_messaging: ^14.7.5
  cached_network_image: ^3.3.0
  photo_view: ^0.14.0
  
  preload_page_view: ^0.2.0
  flutter_google_places_hoc081098: ^1.2.0
  material_design_icons_flutter: 7.0.7296
  google_mobile_ads: ^3.1.0
  google_mobile_ads: ^4.0.0
  google_maps_webservice: ^0.0.20-nullsafety.2
  firebase_dynamic_links: ^5.4.5
  cupertino_icons: ^1.0.6

  dev_dependencies:
    flutter_test:
      sdk: flutter