I am using the 2019.1.6 version. I got this error when I trying to build my app. Can you please help me to solve this. This is an urgent project. 
CommandInvokationFailure: Gradle build failed.
E:\2019.1.6f1\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\OpenJDK\Windows\bin\java.exe -classpath “E:\2019.1.6f1\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\gradle\lib\gradle-launcher-4.6.jar” org.gradle.launcher.GradleMain “-Dorg.gradle.jvmargs=-Xmx98304m” “assembleRelease”
stderr[
FAILURE: Build failed with an exception.
- What went wrong:
Execution failed for task ‘:packageRelease’.
org.gradle.tooling.BuildException (no error message)
- 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 28m 49s
]
stdout[
:checkReleaseClasspath UP-TO-DATE
:preBuild UP-TO-DATE
:preReleaseBuild UP-TO-DATE
:compileReleaseAidl NO-SOURCE
:compileReleaseRenderscript UP-TO-DATE
:checkReleaseManifest UP-TO-DATE
:generateReleaseBuildConfig UP-TO-DATE
:prepareLintJar UP-TO-DATE
:mainApkListPersistenceRelease UP-TO-DATE
:generateReleaseResValues UP-TO-DATE
:generateReleaseResources UP-TO-DATE
:mergeReleaseResources UP-TO-DATE
:createReleaseCompatibleScreenManifests UP-TO-DATE
:processReleaseManifest
:splitsDiscoveryTaskRelease UP-TO-DATE
:processReleaseResources
:generateReleaseSources
:javaPreCompileRelease UP-TO-DATE
:compileReleaseJavaWithJavac UP-TO-DATE
:compileReleaseNdk NO-SOURCE
:compileReleaseSources UP-TO-DATE
:lintVitalRelease
:mergeReleaseShaders UP-TO-DATE
:compileReleaseShaders UP-TO-DATE
:generateReleaseAssets UP-TO-DATE
:mergeReleaseAssets
:transformClassesWithDexBuilderForRelease UP-TO-DATE
:transformDexArchiveWithExternalLibsDexMergerForRelease UP-TO-DATE
:transformDexArchiveWithDexMergerForRelease UP-TO-DATE
:mergeReleaseJniLibFolders UP-TO-DATE
:transformNativeLibsWithMergeJniLibsForRelease UP-TO-DATE
:checkReleaseLibraries UP-TO-DATE
:processReleaseJavaRes NO-SOURCE
:transformResourcesWithMergeJavaResForRelease UP-TO-DATE
:validateSigningRelease UP-TO-DATE
:packageRelease FAILED
28 actionable tasks: 5 executed, 23 up-to-date
]
exit code: 1
UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) (at <4132c5c2cd7b45b09ef33302ae416489>:0)
UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) (at <4132c5c2cd7b45b09ef33302ae416489>:0)
UnityEditor.Android.Command.Run (System.String command, System.String args, System.String workingdir, UnityEditor.Android.Command+WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg) (at <4132c5c2cd7b45b09ef33302ae416489>:0)
UnityEditor.Android.AndroidJavaTools.RunJava (System.String args, System.String workingdir, System.Action1[T] progress, System.String error) (at <4132c5c2cd7b45b09ef33302ae416489>:0) UnityEditor.Android.GradleWrapper.Run (UnityEditor.Android.AndroidJavaTools javaTools, System.String workingdir, System.String task, System.Action1[T] progress) (at <4132c5c2cd7b45b09ef33302ae416489>: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 <4132c5c2cd7b45b09ef33302ae416489>:0)
UnityEditor.Android.PostProcessor.Tasks.BuildGradleProject.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <4132c5c2cd7b45b09ef33302ae416489>:0)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <4132c5c2cd7b45b09ef33302ae416489>: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 <4132c5c2cd7b45b09ef33302ae416489>:0)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <4132c5c2cd7b45b09ef33302ae416489>: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 <4132c5c2cd7b45b09ef33302ae416489>:0)
UnityEditor.Android.AndroidBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <4132c5c2cd7b45b09ef33302ae416489>: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 C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:281)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)