Packging : Unknown Error

Hi all,

We are trying to package our video game to windows 64bit and receiving this error, any help please?

UATHelper: Packaging (Windows (64-bit)): Running AutomationTool...
UATHelper: Packaging (Windows (64-bit)): Automation.ParseCommandLine: Parsing command line: -ScriptsForProject="C:/Users/xbox/Documents/Unreal Projects/MyProject7/MyProject7.uproject" BuildCookRun -nocompile -nocompileeditor -installed -nop4 -project="C:/Users/xbox/Documents/Unreal Projects/MyProject7/MyProject7.uproject" -cook -stage -archive -archivedirect
ory=C:/Users/xbox/Desktop/exe -package -clientconfig=Development -ue4exe=UE4Editor-Cmd.exe -pak -prereqs -nodebuginfo -targetplatform=Win64 -utf8output
UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: System.UnauthorizedAccessException: Access to the path 'C:\Program Files\Epic Games\UE_4.16\Engine\Intermediate\Build\XmlConfigCache.bin' is denied.
UATHelper: Packaging (Windows (64-bit)):    at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
UATHelper: Packaging (Windows (64-bit)):    at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
UATHelper: Packaging (Windows (64-bit)):    at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
UATHelper: Packaging (Windows (64-bit)):    at System.IO.File.Open(String path, FileMode mode, FileAccess access, FileShare share)
UATHelper: Packaging (Windows (64-bit)):    at UnrealBuildTool.XmlConfigData.Write(FileReference Location)
UATHelper: Packaging (Windows (64-bit)):    at UnrealBuildTool.XmlConfig.ReadConfigFiles()
UATHelper: Packaging (Windows (64-bit)):    at UnrealBuildTool.PlatformExports.Initialize(Boolean bIsEngineInstalled)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.Automation.Process(String[] Arguments)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.Program.MainProc(Object Param)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.InternalUtils.RunSingleInstance(Func`2 Main, Object Param)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.Program.Main()
UATHelper: Packaging (Windows (64-bit)): Program.Main: AutomationTool exiting with ExitCode=1 (Error_Unknown)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults:Error: Error Unknown Error

Did You fix the problem?
I´m also having it right now.