I get this error;
UATHelper: Packaging (Windows (64-bit)): ERROR: System.ArgumentException: An item with the same key has already been added.
Steps;
1- Create project with basic tamplates on ue 4.27
2- File → Package Project → Windows (64-bit) → Select Folder
3- Look Output log
LogLauncherProfile: Found promoted target with matching version at ../../../Engine/Binaries/Win64/UE4Game.target
UATHelper: Packaging (Windows (64-bit)): Running AutomationTool...
UATHelper: Packaging (Windows (64-bit)): Parsing command line: -ScriptsForProject=C:/Users/vcemi/Desktop/MyProjectTest/MyProjectTest.uproject BuildCookRun -nocompileeditor -installed -nop4 -project=C:/Users/vcemi/Desktop/MyProjectTest/MyProjectTest.uproject -cook -stage -archive -archivedirectory=C:/Users/vcemi/Desktop/MyProjectTest/bb -package -ue4exe="C:\P
rogram Files\Epic Games\UE_4.27\Engine\Binaries\Win64\UE4Editor-Cmd.exe" -compressed -ddc=InstalledDerivedDataBackendGraph -pak -prereqs -nodebuginfo -targetplatform=Win64 -clientconfig=Development -utf8output
UATHelper: Packaging (Windows (64-bit)): Setting up ProjectParams for C:\Users\vcemi\Desktop\MyProjectTest\MyProjectTest.uproject
UATHelper: Packaging (Windows (64-bit)): ERROR: System.ArgumentException: An item with the same key has already been added.
UATHelper: Packaging (Windows (64-bit)): at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
UATHelper: Packaging (Windows (64-bit)): at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
UATHelper: Packaging (Windows (64-bit)): at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer)
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.ProjectUtils.RequiresTempTarget(FileReference RawProjectPath, Boolean bProjectHasCode, UnrealTargetPlatform Platform, UnrealTargetConfiguration Configuration, TargetType TargetType, Boolean bRequiresAssetNativization, Boolean bRequiresCookedData, String& OutReason) in D:\Build\++UE4\Sync\En
gine\Source\Programs\AutomationTool\AutomationUtils\ProjectUtils.cs:line 214
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.ProjectUtils.RequiresTempTarget(FileReference RawProjectPath, List`1 Platforms, List`1 Configurations, Boolean AssetNativizationRequested) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\ProjectUtils.cs:line 161
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.ProjectUtils.DetectProjectProperties(FileReference RawProjectPath, List`1 ClientTargetPlatforms, List`1 ClientTargetConfigurations, Boolean AssetNativizationRequested) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\ProjectUtils.cs:line 539
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.ProjectUtils.GetProjectProperties(FileReference RawProjectPath, List`1 ClientTargetPlatforms, List`1 ClientTargetConfigurations, Boolean AssetNativizationRequested) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\ProjectUtils.cs:line 105
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.ProjectParams.AutodetectSettings(Boolean bReset) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\ProjectParams.cs:line 2108
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.ProjectParams..ctor(FileReference RawProjectPath, BuildCommand Command, String Device, String MapToRun, String AdditionalServerMapParams, ParamList`1 Port, String RunCommandline, String StageCommandline, String BundleName, String StageDirectoryParam, String UE4Exe, String SignPak, List`1 Cl
ientConfigsToBuild, List`1 ServerConfigsToBuild, ParamList`1 MapsToCook, ParamList`1 MapIniSectionsToCook, ParamList`1 DirectoriesToCook, String DDCGraph, String InternationalizationPreset, ParamList`1 CulturesToCook, ParamList`1 ClientCookedTargets, ParamList`1 EditorTargets, ParamList`1 ServerCookedTargets, List`1 ClientTargetPlatforms, Dictionary`2 Client
DependentPlatformMap, List`1 ServerTargetPlatforms, Dictionary`2 ServerDependentPlatformMap, Nullable`1 Build, Nullable`1 SkipBuildClient, Nullable`1 SkipBuildEditor, Nullable`1 Cook, Nullable`1 Run, Nullable`1 SkipServer, Nullable`1 Clean, Nullable`1 Compressed, Nullable`1 ForceUncompressed, String AdditionalPakOptions, String AdditionalIoStoreOptions, Null
able`1 IterativeCooking, String IterateSharedCookedBuild, Nullable`1 IterateSharedBuildUsePrecompiledExe, Nullable`1 CookAll, Nullable`1 CookPartialGC, Nullable`1 CookInEditor, String CookOutputDir, Nullable`1 CookMapsOnly, Nullable`1 CookOnTheFly, Nullable`1 CookOnTheFlyStreaming, Nullable`1 UnversionedCookedContent, Nullable`1 EncryptIniFiles, Nullable`1 E
ncryptPakIndex, Nullable`1 EncryptEverything, Nullable`1 SkipCookingEditorContent, Nullable`1 NumCookersToSpawn, String AdditionalCookerOptions, String OriginalReleaseVersion, String BasedOnReleaseVersion, String CreateReleaseVersion, String CreateReleaseVersionBasePath, String BasedOnReleaseVersionBasePath, Nullable`1 GeneratePatch, Nullable`1 AddPatchLevel
, Nullable`1 StageBaseReleasePaks, String DiscVersion, String DLCName, String DiffCookedContentPath, Nullable`1 DLCIncludeEngineContent, Nullable`1 DLCPakPluginFile, Nullable`1 DLCActLikePatch, Nullable`1 CrashReporter, Nullable`1 DedicatedServer, Nullable`1 Client, Nullable`1 Deploy, String DeployFolder, String GetFile, Nullable`1 FileServer, Nullable`1 For
eign, Nullable`1 ForeignCode, Nullable`1 LogWindow, Nullable`1 NoCleanStage, Nullable`1 NoClient, Nullable`1 NoDebugInfo, Nullable`1 SeparateDebugInfo, Nullable`1 MapFile, Nullable`1 NoXGE, Nullable`1 SkipPackage, Nullable`1 Package, Nullable`1 Pak, Nullable`1 IgnorePaksFromDifferentCookSource, Nullable`1 IoStore, Nullable`1 SkipIoStore, Nullable`1 GenerateO
ptimizationData, Nullable`1 Prereqs, String AppLocalDirectory, Nullable`1 NoBootstrapExe, Nullable`1 SignedPak, Nullable`1 PakAlignForMemoryMapping, Nullable`1 NullRHI, Nullable`1 FakeClient, Nullable`1 EditorTest, Nullable`1 RunAutomationTests, String RunAutomationTest, Nullable`1 CrashIndex, Nullable`1 SkipCook, Nullable`1 SkipCookOnTheFly, Nullable`1 Skip
Pak, Nullable`1 PrePak, Nullable`1 SkipStage, Nullable`1 Stage, Nullable`1 Manifests, Nullable`1 CreateChunkInstall, Nullable`1 SkipEncryption, Nullable`1 Unattended, Nullable`1 NumClients, Nullable`1 Archive, String ArchiveDirectoryParam, Nullable`1 ArchiveMetaData, Nullable`1 CreateAppBundle, String SpecifiedClientTarget, String SpecifiedServerTarget, Para
mList`1 ProgramTargets, Nullable`1 Distribution, Nullable`1 Prebuilt, Nullable`1 RunTimeoutSeconds, String SpecifiedArchitecture, String UbtArgs, String AdditionalPackageOptions, Nullable`1 IterativeDeploy, Nullable`1 FastCook, Nullable`1 IgnoreCookErrors, Nullable`1 RunAssetNativization, Nullable`1 CodeSign, Nullable`1 TreatNonShippingBinariesAsDebugFiles,
Nullable`1 UseExtraFlavor, String Provision, String Certificate, String Team, Boolean AutomaticSigning, ParamList`1 InMapsToRebuildLightMaps, ParamList`1 InMapsToRebuildHLOD, ParamList`1 TitleID) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\ProjectParams.cs:line 1102
UATHelper: Packaging (Windows (64-bit)): at BuildCookRun.SetupParams() in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\Scripts\BuildCookRun.Automation.cs:line 46
UATHelper: Packaging (Windows (64-bit)): at BuildCookRun.ExecuteBuild() in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\Scripts\BuildCookRun.Automation.cs:line 37
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.BuildCommand.Execute() in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\BuildCommand.cs:line 263
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Automation.Execute(List`1 CommandsToExecute, Dictionary`2 Commands) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\Automation.cs:line 547
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Automation.Process(String[] Arguments, StartupTraceListener StartupListener) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\Automation.cs:line 511
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Program.MainProc(String[] Arguments, StartupTraceListener StartupListener) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\Program.cs:line 175
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Program.<>c__DisplayClass1_0.<Main>b__2() in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\Program.cs:line 87
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.InternalUtils.RunSingleInstance(Func`1 Main) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\AutomationUtils\Utils.cs:line 739
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Program.Main(String[] Arguments) in D:\Build\++UE4\Sync\Engine\Source\Programs\AutomationTool\Program.cs:line 87
UATHelper: Packaging (Windows (64-bit)): (see C:\Users\vcemi\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.27\Log.txt for full exception trace)
PackagingResults: Error: System.ArgumentException: An item with the same key has already been added.
UATHelper: Packaging (Windows (64-bit)): AutomationTool exiting with ExitCode=1 (Error_Unknown)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults: Error: Unknown Error