I just came to report the same thing! There is also something up with compiling c++ games that causes it to fail like this:
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: [4/4] Link DACPP_BP.exe
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: Creating library d:\UE\DACPP_BP\Binaries\Win64\DACPP_BP.lib and object d:\UE\DACPP_BP\Binaries\Win64\DACPP_BP.exp
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: UELinkerFixups.cpp.obj : error LNK2019: unresolved external symbol "void __cdecl EmptyLinkFunctionForGeneratedCode1DungeonArchitectRuntime(void)" (?EmptyLinkFunctionForGeneratedCode1DungeonArchitectRuntime@@YAXXZ) referenced in function "void __cdecl UELinkerFixups(void)" (?UELinkerFixups@@YAXXZ)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: UELinkerFixups.cpp.obj : error LNK2019: unresolved external symbol "void __cdecl EmptyLinkFunctionForGeneratedCode2DungeonArchitectRuntime(void)" (?EmptyLinkFunctionForGeneratedCode2DungeonArchitectRuntime@@YAXXZ) referenced in function "void __cdecl UELinkerFixups(void)" (?UELinkerFixups@@YAXXZ)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: UELinkerFixups.cpp.obj : error LNK2019: unresolved external symbol "void __cdecl EmptyLinkFunctionForStaticInitializationDungeonArchitectRuntime(void)" (?EmptyLinkFunctionForStaticInitializationDungeonArchitectRuntime@@YAXXZ) referenced in function "void __cdecl UELinkerFixups(void)" (?UELinkerFixups@
@YAXXZ)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: d:\UE\DACPP_BP\Binaries\Win64\DACPP_BP.exe : fatal error LNK1120: 3 unresolved externals
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: ERROR: UBT ERROR: Failed to produce item: d:\UE\DACPP_BP\Binaries\Win64\DACPP_BP.exe
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: Total build time: 40.47 seconds (Local executor: 0.00 seconds)
UATHelper: Packaging (Windows (64-bit)): CommandUtils.Run: Run: Took 41.0459162s to run UnrealBuildTool.exe, ExitCode=5
UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.CommandUtils+CommandFailedException: Command failed (Result:5): C:\Program Files\Epic Games\UE_4.16\Engine\Binaries\DotNET\UnrealBuildTool.exe DACPP_BP Win64 Development -Project=d:\UE\DACPP_BP\DACPP_BP.uproject d:\UE\DACPP_BP\DACPP_BP.upro
ject -NoUBTMakefiles -remoteini="d:\UE\DACPP_BP" -noxge -NoHotReload -ignorejunk. See logfile for details: 'UnrealBuildTool-2017.11.14-08.47.54.txt'
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunAndLog(String App, String CommandLine, String Logfile, Int32 MaxSuccessCode, String Input, ERunOptions Options, Dictionary`2 EnvVars, SpewFilterCallbackType SpewFilterCallback)
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunAndLog(CommandEnvironment Env, String App, String CommandLine, String LogName, Int32 MaxSuccessCode, String Input, ERunOptions Options, Dictionary`2 EnvVars, SpewFilterCallbackType SpewFilterCallback)
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunUBT(CommandEnvironment Env, String UBTExecutable, String CommandLine, String LogName, Dictionary`2 EnvVars)
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunUBT(CommandEnvironment Env, String UBTExecutable, FileReference Project, String Target, String Platform, String Config, String AdditionalArgs, String LogName, Dictionary`2 EnvVars)
UATHelper: Packaging (Windows (64-bit)): at 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: Packaging (Windows (64-bit)): at 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, Dictio
nary`2 InTargetToManifest)
UATHelper: Packaging (Windows (64-bit)): at Project.Build(BuildCommand Command, ProjectParams Params, Int32 WorkingCL, ProjectBuildTargets TargetMask)
UATHelper: Packaging (Windows (64-bit)): at BuildCookRun.DoBuildCookRun(ProjectParams Params)
UATHelper: Packaging (Windows (64-bit)): at BuildCookRun.ExecuteBuild()
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.BuildCommand.Execute()
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Automation.Execute(List`1 CommandsToExecute, CaselessDictionary`1 Commands)
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=5 (5)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults:Error: Error Unknown Error
I have tried both 4.16.3 and 4.17.2 with clean projects and just a ground element in the theme.