I was trying to package my UE4.19 game (with Advanced Sessions, Advanced Steam Sessions, and Discord RPC), and I get this error (full log [cut and pasted from Output Log window]):
UATHelper: Packaging (Windows (64-bit)): Running AutomationTool...
UATHelper: Packaging (Windows (64-bit)): Parsing command line: -ScriptsForProject="C:/Users/Process Daemon/Dropbox/UEP/Dragoon_CPP/Dragoon_CPP.uproject" BuildCookRun -nocompile -nocompileeditor -installed -nop4 -project="C:/Users/Process Daemon/Dropbox/UEP/Dragoon_CPP/Dragoon_CPP.uproject" -cook -stage -archive -archivedirectory="C:/Users/Process Daemon/Drop
box/UEP/Built/Dragoon_CPP" -package -clientconfig=Development -ue4exe=UE4Editor-Cmd.exe -pak -prereqs -nodebuginfo -targetplatform=Win64 -build -utf8output
UATHelper: Packaging (Windows (64-bit)): Setting up ProjectParams for C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject
UATHelper: Packaging (Windows (64-bit)): ********** BUILD COMMAND STARTED **********
UATHelper: Packaging (Windows (64-bit)): Running: C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Binaries\DotNET\UnrealBuildTool.exe Dragoon_CPP Win64 Development -Project="C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject" "C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject" -NoUBTMakefiles -remoteini="C:\Users\Proce
ss Daemon\Dropbox\UEP\Dragoon_CPP" -skipdeploy -noxge -generatemanifest -NoHotReload
UATHelper: Packaging (Windows (64-bit)): Took 1.5100863s to run UnrealBuildTool.exe, ExitCode=0
UATHelper: Packaging (Windows (64-bit)): Running: C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Binaries\DotNET\UnrealBuildTool.exe Dragoon_CPP Win64 Development -Project="C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject" "C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject" -NoUBTMakefiles -remoteini="C:\Users\Proce
ss Daemon\Dropbox\UEP\Dragoon_CPP" -skipdeploy -noxge -NoHotReload -ignorejunk
UATHelper: Packaging (Windows (64-bit)): Performing 16 actions (4 in parallel)
UATHelper: Packaging (Windows (64-bit)): SharedPCH.Engine.cpp
UATHelper: Packaging (Windows (64-bit)): Module.DiscordRpc.cpp
UATHelper: Packaging (Windows (64-bit)): Module.DiscordRpc.gen.cpp
UATHelper: Packaging (Windows (64-bit)): Module.AdvancedSessions.cpp
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(37): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(76): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(155): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(37): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(37): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(76): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(76): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C2143: syntax error: missing ';' before '<class-head>'C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C2143: syntax e
rror: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)):
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(155): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(155): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(37): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(76): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(155): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C3861: 'FOnSystemFinished_DelegateWrapper': identifier not found
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(98): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C3861: 'FOnSystemFinished_DelegateWrapper': identifier not found
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(98): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(329): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(329): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C3861: 'FOnSystemFinished_DelegateWrapper': identifier not found
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(98): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(329): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
PackagingResults: Error: missing ';' before '<class-head>'
PackagingResults: Error: missing ';' before '<class-head>'
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): Module.AdvancedSessions.gen.cpp
UATHelper: Packaging (Windows (64-bit)): Module.AdvancedSteamSessions.cpp
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(37): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(76): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(155): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): UELinkerFixups.cpp
UATHelper: Packaging (Windows (64-bit)): Module.AdvancedSteamSessions.gen.cpp
UATHelper: Packaging (Windows (64-bit)): C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Intermediate\Build\Win64\UE4\Development\UELinkerFixups.cpp: fatal error C1853: 'C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Intermediate\Build\Win64\Dragoon_CPP\Development\UELinkerFixups\PCH.UELinkerFixups.h.pch' precompiled header file is from a previous version
of the compiler, or the precompiled header is C++ and you are using it from C (or vice versa)
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(37): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(76): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(155): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C3861: 'FOnSystemFinished_DelegateWrapper': identifier not found
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(98): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(329): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C3861: 'FOnSystemFinished_DelegateWrapper': identifier not found
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(98): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(329): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(37): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(76): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(153): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Components/StaticMeshComponent.h(155): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(89): error C3861: 'FOnSystemFinished_DelegateWrapper': identifier not found
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(98): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C2143: syntax error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(327): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
UATHelper: Packaging (Windows (64-bit)): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Source\Runtime\Engine\Classes\Particles/ParticleSystemComponent.h(329): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
PackagingResults: Error: missing ';' before '<class-head>'
PackagingResults: Error: missing ';' before '<class-head>'
UATHelper: Packaging (Windows (64-bit)): ERROR: UBT ERROR: Failed to produce item: C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Binaries\Win64\Dragoon_CPP.exe
UATHelper: Packaging (Windows (64-bit)): Total build time: 49.79 seconds (Local executor: 0.00 seconds)
UATHelper: Packaging (Windows (64-bit)): Took 50.0508627s to run UnrealBuildTool.exe, ExitCode=5
UATHelper: Packaging (Windows (64-bit)): ERROR: Command failed (Result:5): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Binaries\DotNET\UnrealBuildTool.exe Dragoon_CPP Win64 Development -Project="C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject" "C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject" -NoUBTMakefiles -
remoteini="C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP" -skipdeploy -noxge -NoHotReload -ignorejunk. See logfile for details: 'UnrealBuildTool-2018.09.01-12.34.27.txt'
UATHelper: Packaging (Windows (64-bit)): (see C:\Users\Process Daemon\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+(x86)+Epic+Games+UE_4.19\UAT_Log.txt for full exception trace)
PackagingResults: Error: UBT ERROR: Failed to produce item: C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Binaries\Win64\Dragoon_CPP.exe
PackagingResults: Error: Command failed (Result:5): C:\Program Files (x86)\Epic Games\UE_4.19\Engine\Binaries\DotNET\UnrealBuildTool.exe Dragoon_CPP Win64 Development -Project="C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject" "C:\Users\Process Daemon\Dropbox\UEP\Dragoon_CPP\Dragoon_CPP.uproject" -NoUBTMakefiles -remoteini="C:\Users\Pro
cess Daemon\Dropbox\UEP\Dragoon_CPP" -skipdeploy -noxge -NoHotReload -ignorejunk. See logfile for details: 'UnrealBuildTool-2018.09.01-12.34.27.txt'
UATHelper: Packaging (Windows (64-bit)): AutomationTool exiting with ExitCode=5 (5)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults: Error: Unknown Error
Is something wrong with my UE4 installation?
EDIT: Packaging a new (empty) C++ project gives the same errors…
EDIT 2: Removing UE 4.19 and reinstalling it fixed these errors.