Question Build failure - I get the same error when i try to build with any ad service "r8 is deprecated"

I always get the same error when I use admob or a similar services(unity ads working fine). There are a lot of topics about this error in the forums, but the solutions I tried did not work. Here are the solutions I tried: Creating custom gradle.properties and deleting the r8 code did not work. Create a custom base gradle template and change 'com.android.tools.build:gradle:3.6.0' to 'com.android.tools.build:gradle:3.4.0' did not work. change target api "Target API Level" to "Android 11.0 (API level 30)" did not work please can somebody help me?

Code (CSharp):

1. Starting a Gradle Daemon, 1 incompatible and 8 stopped Daemons could not be reused, use --status for details
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3. Configure project :launcher WARNING: The option 'android.enableR8' is deprecated and should not be used anymore. It will be removed in a future version of the Android Gradle plugin, and will no longer allow you to disable R8.
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5. Task :unityLibrary:preBuild UP-TO-DATE Task :launcher:preBuild UP-TO-DATE Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:preBuild UP-TO-DATE Task :unityLibrary:preReleaseBuild UP-TO-DATE Task :launcher:preReleaseBuild UP-TO-DATE Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:preReleaseBuild UP-TO-DATE Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:compileReleaseAidl NO-SOURCE Task :unityLibrary:packageReleaseRenderscript NO-SOURCE Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:packageReleaseRenderscript NO-SOURCE Task :unityLibrary:compileReleaseAidl NO-SOURCE Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:compileReleaseRenderscript NO-SOURCE Task :unityLibrary:compileReleaseRenderscript NO-SOURCE Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:generateReleaseResValues Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:generateReleaseResources Task :launcher:generateReleaseBuildConfig Task :launcher:compileReleaseAidl NO-SOURCE Task :unityLibrary:generateReleaseBuildConfig Task :launcher:compileReleaseRenderscript NO-SOURCE Task :unityLibrary:generateReleaseResValues Task :unityLibrary:generateReleaseResources Task :launcher:mainApkListPersistenceRelease Task :launcher:generateReleaseResValues Task :launcher:generateReleaseResources Task :launcher:createReleaseCompatibleScreenManifests Task :launcher:extractDeepLinksRelease Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:packageReleaseResources Task :launcher:prepareLintJar Task :unityLibrary:packageReleaseResources Task :unityLibrary:extractDeepLinksRelease Task :unityLibrary:parseReleaseLocalResources Task :unityLibrary:mergeReleaseShaders Task :unityLibrary:compileReleaseShaders Task :unityLibrary:generateReleaseAssets Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:generateReleaseBuildConfig Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:processReleaseManifest Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:extractDeepLinksRelease Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:parseReleaseLocalResources Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:javaPreCompileRelease Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:prepareLintJarForPublish Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:mergeReleaseShaders Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:compileReleaseShaders Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:generateReleaseAssets Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:packageReleaseAssets Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:processReleaseJavaRes NO-SOURCE Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:compileReleaseLibraryResources Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:mergeReleaseJniLibFolders Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:bundleLibResRelease Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:generateReleaseRFile Task :launcher:checkReleaseDuplicateClasses FAILED Task :unityLibrary:packageReleaseAssets Task :unityLibrary:compileReleaseLibraryResources Task :unityLibrary:prepareLintJarForPublish Task :unityLibrary:processReleaseManifest Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:compileReleaseJavaWithJavac Task :unityLibrary:GoogleMobileAdsPlugin.androidlib:mergeReleaseNativeLibs 35 actionable tasks: 35 executed
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7. UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)
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9. FAILURE: Build failed with an exception.
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11. What went wrong: Execution failed for task ':launcher:checkReleaseDuplicateClasses'.
12. 1 exception was raised by workers: java.lang.RuntimeException: Duplicate class com.google.android.gms.tasks.CancellationToken found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.CancellationTokenSource found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.Continuation found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.OnCanceledListener found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.OnCompleteListener found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.OnFailureListener found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.OnSuccessListener found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.OnTokenCanceledListener found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.RuntimeExecutionException found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.SuccessContinuation found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.Task found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.TaskCompletionSource found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.TaskExecutors found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.TaskExecutors$zza found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.Tasks found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.Tasks$zza found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.Tasks$zzb found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.Tasks$zzc found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zza found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzb found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzc found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzd found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zze found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzf found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzg found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzh found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzi found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzj found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzk found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzl found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzm found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzn found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzo found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzp found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzq found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzr found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzs found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzt found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzu found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzu$zza found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzv found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzw found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Duplicate class com.google.android.gms.tasks.zzx found in modules com.google.android.gms.play-services-tasks-17.0.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.0.0:) and com.google.android.gms.play-services-tasks-17.2.0-runtime.jar (:com.google.android.gms.play-services-tasks-17.2.0:) Go to the documentation to learn how to Fix dependency resolution errors.
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14. Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
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16. Get more help at https://help.gradle.org
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18. BUİLD FAILED in 19s Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
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20. UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

 

You can see that you are getting "Duplicate class" error because you have multiple versions of the same SDK:

Code (CSharp):

1.  
2. com.google.android.gms.play-services-tasks-17.0.0-runtime.jar
3. com.google.android.gms.play-services-tasks-17.2.0-runtime.jar
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Just delete the x-17.0.0.jar and it should build fine (if you don't have any other issues)

 

I searched in all files, but unfortunately these two files did not come out.

 

any help please?

 

Well, you know what is causing the error so you need to remove one version of the tasks jar. If the gradle output says it's there, then it must be there. Maybe it's included in some sdk package directly or as dependency, this kind of error usually happens after you update the sdk over older version and the files are not deleted before the update. Search all "Plugins/Android/.." directories manually (there might be more than one Android directory inside your Assets). I would suggest that you update all your SDKs because play-services-tasks v17.0.0 was released on June 17, 2019 according to this changelog https://developers.google.com/android/guides/releases.