Could not get unknown property 'unityStreamingAssets' for object of type com.android.build.gradle.internal.dsl.AaptOptions

After upgrading to Unity 2020.2.1f1, the build fails because of these errors:

CommandInvokationFailure: Gradle build failed.
F:\ProgramFiles\Unity\2020.2.1f1\Editor\Data\PlaybackEngines\AndroidPlayer\OpenJDK\bin\java.exe -classpath “F:\ProgramFiles\Unity\2020.2.1f1\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\gradle\lib\gradle-launcher-5.6.4.jar” org.gradle.launcher.GradleMain “-Dorg.gradle.jvmargs=-Xmx4096m” “bundleRelease”
stderr[
FAILURE: Build failed with an exception.

  • Where:
    Build file ‘F:\MyGame\Temp\gradleOut\launcher\build.gradle’ line: 30
  • What went wrong:
    A problem occurred evaluating project ‘:launcher’.

Could not get unknown property ‘unityStreamingAssets’ for object of type com.android.build.gradle.internal.dsl.AaptOptions.

  • 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.
  • Get more help at https://help.gradle.org
    BUILD FAILED in 22s
    Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
    ]
    stdout[
    Starting a Gradle Daemon, 1 incompatible Daemon could not be reused, use --status for details

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.
]
exit code: 1
UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.Android.Command.Run (System.String command, System.String args, System.String workingdir, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.Android.AndroidJavaTools.RunJava (System.String args, System.String workingdir, System.Action1[T] progress, System.String error) (at <5cf84f2cc5134566935b135856517214>:0) UnityEditor.Android.GradleWrapper.Run (UnityEditor.Android.AndroidJavaTools javaTools, System.String workingdir, System.String task, System.Action1[T] progress) (at <5cf84f2cc5134566935b135856517214>:0)
Rethrow as GradleInvokationException: Gradle build failed
UnityEditor.Android.GradleWrapper.Run (UnityEditor.Android.AndroidJavaTools javaTools, System.String workingdir, System.String task, System.Action`1[T] progress) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.Android.PostProcessor.Tasks.BuildGradleProject.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <5cf84f2cc5134566935b135856517214>:0)
Rethrow as BuildFailedException: Exception of type ‘UnityEditor.Build.BuildFailedException’ was thrown.
UnityEditor.Android.PostProcessor.CancelPostProcess.AbortBuild (System.String title, System.String message, System.Exception ex) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.Android.PostProcessAndroidPlayer.PostProcess (UnityEditor.BuildTarget target, System.String stagingAreaData, System.String stagingArea, System.String playerPackage, System.String installPath, System.String companyName, System.String productName, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.Android.AndroidBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <5cf84f2cc5134566935b135856517214>:0)
UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at <1e441e8684a14fe4b8f8a926d91afc3a>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)


I can’t find what I should do to fix that. Any Idea?

Had the same error. Fixed it by adding this line to the gradle.properties file:

unityStreamingAssets=.unity3d, google-services-desktop.json, google-services.json, GoogleService-Info.plist