Getting errors when packaging for Windows with Cesium for Unreal 5.3.0

Unreal Engine launcher said Cesium plugin had an update and so I updated it.

I get a number of weird errors now when trying to package for windows.

Now granted I haven’t tried to package for a few months now but never had such trouble before.
Pasted is the section of the log. Some of the errors are also in the engine itself. Very odd.

A lot of them are in Cesiumgltf\AccessorUtility


UATHelper: Packaging (Windows): [2/19] Compile [x64] Module.CesiumGenericFoliage.cpp
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(12): error C4003: not enough arguments for function-like macro invocation ‘max’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(58): error C4003: not enough arguments for function-like macro invocation ‘max’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\Core\Public\Misc\AssertionMacros.h(250): note: in expansion of macro ‘checkf’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(65): error C4003: not enough arguments for function-like macro invocation ‘max’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\Core\Public\Misc\AssertionMacros.h(250): note: in expansion of macro ‘checkf’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(12): error C2589: ‘(’: illegal token on right side of ‘::’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(76): note: see reference to class template instantiation ‘TRelativePtr<T,OffsetType>’ being compiled
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(12): error C2059: syntax error: ‘(’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C2589: ‘(’: illegal token on right side of ‘::’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C3878: syntax error: unexpected token ‘(’ following ‘expression’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): note: error recovery skipped: ‘( (’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C2760: syntax error: ‘>’ was unexpected here; expected ‘statement’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): note: error recovery skipped: ‘>’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C2760: syntax error: ‘)’ was unexpected here; expected ‘expression’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C2760: syntax error: ‘)’ was unexpected here; expected ‘;’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C3878: syntax error: unexpected token ‘)’ following ‘expression_statement’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C3878: syntax error: unexpected token ‘)’ following ‘statement’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C3878: syntax error: unexpected token ‘)’ following ‘selection_statement’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C3878: syntax error: unexpected token ‘)’ following ‘statement_seq’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): note: missing one of: ‘}’ ?
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C2760: syntax error: ‘)’ was unexpected here; expected ‘}’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): error C3878: syntax error: unexpected token ‘)’ following ‘compound_statement’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): note: error recovery skipped: ‘) ) ?’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): note: error recovery skipped: ‘) :’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(57): note: error recovery skipped: ‘) ) ) . . . )’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(12): error C2062: type ‘unknown-type’ unexpected
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(12): error C2789: ‘TRelativePtr<void,uint32>::NullValue’: an object of const-qualified type must be initialized
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(12): note: see declaration of ‘TRelativePtr<void,uint32>::NullValue’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Source\Runtime\MovieScene\Public\EntitySystem\RelativePtr.h(12): error C2059: syntax error: ‘)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): error C4003: not enough arguments for function-like macro invocation ‘max’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): error C4003: not enough arguments for function-like macro invocation ‘max’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): error C2589: ‘(’: illegal token on right side of ‘::’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): error C3878: syntax error: unexpected token ‘(’ following ‘expression’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): note: error recovery skipped: ‘( (’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): error C2760: syntax error: ‘)’ was unexpected here; expected ‘;’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): error C3878: syntax error: unexpected token ‘)’ following ‘expression_statement’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): note: error recovery skipped: ‘) >’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): error C2760: syntax error: ‘)’ was unexpected here; expected ‘expression’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): note: error recovery skipped: ‘) ) ?’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): note: error recovery skipped: ‘) :’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(253): note: error recovery skipped: ‘) )’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): error C2589: ‘(’: illegal token on right side of ‘::’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): error C3878: syntax error: unexpected token ‘(’ following ‘expression’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): note: error recovery skipped: ‘( (’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): error C2760: syntax error: ‘)’ was unexpected here; expected ‘;’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): error C3878: syntax error: unexpected token ‘)’ following ‘expression_statement’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): note: error recovery skipped: ‘) >’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
PackagingResults: Error: ‘(’
PackagingResults: Error: unexpected token ‘(’ following ‘expression’
PackagingResults: Error: ‘>’ was unexpected here; expected ‘statement’
PackagingResults: Error: ‘)’ was unexpected here; expected ‘expression’
PackagingResults: Error: ‘)’ was unexpected here; expected ‘;’
PackagingResults: Error: unexpected token ‘)’ following ‘expression_statement’
PackagingResults: Error: unexpected token ‘)’ following ‘statement’
PackagingResults: Error: unexpected token ‘)’ following ‘selection_statement’
PackagingResults: Error: unexpected token ‘)’ following ‘statement_seq’
PackagingResults: Error: ‘)’ was unexpected here; expected ‘}’
PackagingResults: Error: unexpected token ‘)’ following ‘compound_statement’
PackagingResults: Error: ‘)’
PackagingResults: Error: unexpected token ‘(’ following ‘expression’
PackagingResults: Error: ‘)’ was unexpected here; expected ‘;’
PackagingResults: Error: unexpected token ‘)’ following ‘expression_statement’
PackagingResults: Error: ‘)’ was unexpected here; expected ‘expression’
PackagingResults: Error: unexpected token ‘(’ following ‘expression’
PackagingResults: Error: ‘)’ was unexpected here; expected ‘;’
PackagingResults: Error: unexpected token ‘)’ following ‘expression_statement’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): error C2760: syntax error: ‘)’ was unexpected here; expected ‘expression’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): note: error recovery skipped: ‘) ) ?’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): note: error recovery skipped: ‘) :’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(254): note: error recovery skipped: ‘) )’
UATHelper: Packaging (Windows): H:\Epic Games\UE_5.3\Engine\Plugins\Marketplace\CesiumForUnreal\Source\ThirdParty\include\CesiumGltf\AccessorUtility.h(244): note: This diagnostic occurred in the compiler generated function ‘std::optionalglm::dvec2 CesiumGltf::TexCoordFromAccessor::operator ()(const CesiumGltf::AccessorView<CesiumGltf::AccessorTypes::VEC2> &)’
UATHelper: Packaging (Windows): [3/19] Compile [x64] FlightVisualizer.init.gen.cpp
UATHelper: Packaging (Windows): [4/19] Compile [x64] GeoSpawnParameters.cpp
UATHelper: Packaging (Windows): [5/19] Compile [x64] FlightVisualizerModeBase.cpp
PackagingResults: Error: ‘)’ was unexpected here; expected ‘expression’
UATHelper: Packaging (Windows): [6/19] Compile [x64] AvatarBase.gen.cpp
UATHelper: Packaging (Windows): [7/19] Compile [x64] PawnAvatar.gen.cpp
UATHelper: Packaging (Windows): [8/19] Compile [x64] BlueprintDatabridgeLibrary.cpp
UATHelper: Packaging (Windows): [9/19] Compile [x64] FlightVisualizer.cpp
UATHelper: Packaging (Windows): [10/19] Compile [x64] FlightVisualizerSimInstance.gen.cpp
UATHelper: Packaging (Windows): [11/19] Compile [x64] GeoSpawnParameters.gen.cpp
UATHelper: Packaging (Windows): [12/19] Compile [x64] BlueprintDatabridgeLibrary.gen.cpp
UATHelper: Packaging (Windows): [13/19] Compile [x64] FlightVisualizerModeBase.gen.cpp
UATHelper: Packaging (Windows): [14/19] Compile [x64] FlightVisualizerSimInstance.cpp
UATHelper: Packaging (Windows): [15/19] Compile [x64] AvatarBase.cpp
UATHelper: Packaging (Windows): [16/19] Compile [x64] PawnAvatar.cpp
UATHelper: Packaging (Windows): [17/19] Compile [x64] Module.GenericFoliage.cpp
UATHelper: Packaging (Windows): Total time in Parallel executor: 184.39 seconds
UATHelper: Packaging (Windows): Total execution time: 201.88 seconds
UATHelper: Packaging (Windows): Took 202.44s to run dotnet.exe, ExitCode=6
UATHelper: Packaging (Windows): UnrealBuildTool failed. See log for more details. (C:\Users\Eric\AppData\Roaming\Unreal Engine\AutomationTool\Logs\H+Epic+Games+UE_5.3\UBT-FlightVisualizer-Win64-Development.txt)
UATHelper: Packaging (Windows): AutomationTool executed for 0h 3m 26s
UATHelper: Packaging (Windows): AutomationTool exiting with ExitCode=6 (6)
UATHelper: Packaging (Windows): BUILD FAILED
LogAudioDerivedData: Display: Building compressed audio format BINKA hash BINKA_SCVER_5028_R4DV_false_SR0_48000.000000_SR1_32000.000000_SR2_24000.000000_SR3_12000.000000_SR4_8000.000000_QMOD_1.000000_CQLT_-1_ASTH_0.000000_INLC_false_CSZE_65536_LCF_false_ZCS_0_MCSO_0_END wave CompileFailed…
PackagingResults: Error: Unknown Error
LogAudio: Display: Chunk sizes for SoundWave /Engine/EditorSounds/Notifications/CompileFailed.CompileFailed: Chunk0=28 bytes, Chunk1-N=256k

If anyone else is coming across this problem, know that it happens even with the previous version of Cesium Plugin so something has changed in the computer over the last few months. I’m guessing some ‘helpful’ auto update from microsoft perhaps.

The only solution I’ve seen is to “start over” that isn’t going to be happening.

There was one suggestion of HAS_CXX_17 being missing, but that wasn’t it either. All I saw after that was complaints that the macro had been redefined so it is apparently in there somewhere.

Ok, returning to this to let everyone know I figured out (more or less) what caused this.
I had some UE4 stuff in there for third person character, which I wasn’t using and have no recollection of how it got in there.

Once I removed that, the packaging and cook worked.

Posting in case someone else has a similar issue and it might help them.