[萌新求助]关于打包和烘焙问题，求大佬帮忙解决【急】

UATHelper: 打包 (Windows (64位)): Running AutomationTool...
UATHelper: 打包 (Windows (64位)): Automation.ParseCommandLine: Parsing command line: -ScriptsForProject=D:/qingtingyingjiuziyuanbao/DR/DR.uproject BuildCookRun -nocompile -nocompileeditor -installed -nop4 -project=D:/qingtingyingjiuziyuanbao/DR/DR.uproject -cook -stage -archive -archivedirectory=D:/qingtingyingjiuziyuanbao/qingtingyingjiu -package -clientconfig
=Development -ue4exe=UE4Editor-Cmd.exe -prereqs -nodebuginfo -targetplatform=Win64 -build -CrashReporter -utf8output
UATHelper: 打包 (Windows (64位)): Automation.Process: Setting up command environment.
UATHelper: 打包 (Windows (64位)): BuildCookRun.SetupParams: Setting up ProjectParams for D:\qingtingyingjiuziyuanbao\DR\DR.uproject
UATHelper: 打包 (Windows (64位)): Project.Build: ********** BUILD COMMAND STARTED **********
UATHelper: 打包 (Windows (64位)): CommandUtils.Run: Run: E:\UE4\Epic Games\4.14\Engine\Binaries\DotNET\UnrealBuildTool.exe DR Win64 Development -Project=D:\qingtingyingjiuziyuanbao\DR\DR.uproject  D:\qingtingyingjiuziyuanbao\DR\DR.uproject  -remoteini="D:\qingtingyingjiuziyuanbao\DR" -noxge -generatemanifest -NoHotReload
UATHelper: 打包 (Windows (64位)): UnrealBuildTool: Performing full C++ include scan (building a new target)
UATHelper: 打包 (Windows (64位)): CommandUtils.Run: Run: Took 4.7632725s to run UnrealBuildTool.exe, ExitCode=0
UATHelper: 打包 (Windows (64位)): CommandUtils.Run: Run: E:\UE4\Epic Games\4.14\Engine\Binaries\DotNET\UnrealBuildTool.exe DR Win64 Development -Project=D:\qingtingyingjiuziyuanbao\DR\DR.uproject  D:\qingtingyingjiuziyuanbao\DR\DR.uproject  -remoteini="D:\qingtingyingjiuziyuanbao\DR" -noxge -NoHotReload -ignorejunk
UATHelper: 打包 (Windows (64位)): UnrealBuildTool: Creating makefile for DR (no existing makefile)
UATHelper: 打包 (Windows (64位)): UnrealBuildTool: Performing full C++ include scan (no include cache file)
UATHelper: 打包 (Windows (64位)): UnrealBuildTool: ERROR: Windows SDK v8.1 must be installed in order to build this target.
UATHelper: 打包 (Windows (64位)): CommandUtils.Run: Run: Took 29.7757031s to run UnrealBuildTool.exe, ExitCode=5
UATHelper: 打包 (Windows (64位)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.CommandUtils+CommandFailedException: Command failed (Result:5): E:\UE4\Epic Games\4.14\Engine\Binaries\DotNET\UnrealBuildTool.exe DR Win64 Development -Project=D:\qingtingyingjiuziyuanbao\DR\DR.uproject  D:\qingtingyingjiuziyuanbao\DR\DR.uproject  -re
moteini="D:\qingtingyingjiuziyuanbao\DR" -noxge -NoHotReload -ignorejunk. See logfile for details: 'UnrealBuildTool-2017.04.28-19.24.30.txt'
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.CommandUtils.RunAndLog(String App, String CommandLine, String Logfile, Int32 MaxSuccessCode, String Input, ERunOptions Options, Dictionary`2 EnvVars, SpewFilterCallbackType SpewFilterCallback)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.CommandUtils.RunAndLog(CommandEnvironment Env, String App, String CommandLine, String LogName, Int32 MaxSuccessCode, String Input, ERunOptions Options, Dictionary`2 EnvVars, SpewFilterCallbackType SpewFilterCallback)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.CommandUtils.RunUBT(CommandEnvironment Env, String UBTExecutable, String CommandLine, String LogName, Dictionary`2 EnvVars)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.CommandUtils.RunUBT(CommandEnvironment Env, String UBTExecutable, FileReference Project, String Target, String Platform, String Config, String AdditionalArgs, String LogName, Dictionary`2 EnvVars)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.UE4Build.BuildWithUBT(String TargetName, UnrealTargetPlatform TargetPlatform, String Config, FileReference UprojectPath, Boolean ForceMonolithic, Boolean ForceNonUnity, Boolean ForceDebugInfo, Boolean ForceFlushMac, Boolean DisableXGE, String InAddArgs, Boolean ForceUnity, Dictionary`2 EnvVars)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.UE4Build.Build(BuildAgenda Agenda, Nullable`1 InDeleteBuildProducts, Boolean InUpdateVersionFiles, Boolean InForceNoXGE, Boolean InUseParallelExecutor, Boolean InForceNonUnity, Boolean InForceUnity, Boolean InShowProgress, Dictionary`2 PlatformEnvVars, Nullable`1 InChangelistNumberOverride, Dictionary`2 InTa
rgetToManifest)
UATHelper: 打包 (Windows (64位)):    在 Project.Build(BuildCommand Command, ProjectParams Params, Int32 WorkingCL, ProjectBuildTargets TargetMask)
UATHelper: 打包 (Windows (64位)):    在 BuildCookRun.DoBuildCookRun(ProjectParams Params)
UATHelper: 打包 (Windows (64位)):    在 BuildCookRun.ExecuteBuild()
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.BuildCommand.Execute()
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.Automation.Execute(List`1 CommandsToExecute, CaselessDictionary`1 Commands)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.Automation.Process(String[] Arguments)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.Program.MainProc(Object Param)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.InternalUtils.RunSingleInstance(Func`2 Main, Object Param)
UATHelper: 打包 (Windows (64位)):    在 AutomationTool.Program.Main()
UATHelper: 打包 (Windows (64位)): Program.Main: AutomationTool exiting with ExitCode=5 (5)
UATHelper: 打包 (Windows (64位)): BUILD FAILED

ERROR: Windows SDK v8.1 must be installed in order to build this target.
试下重装Windows SDK v8.1