UAT Critical Error Assertion failed: SerializeNum >= 0

Hi there, long shot on this one but hope someone can help out on this. I suspect it might be from updating an old project to new platform but am running out of things to search and running on a dead end … any help will be greatly appreciated!

UATHelper: Packaging (Windows (64-bit)):
UATHelper: Packaging (Windows (64-bit)): Script Stack (0 frames):
UATHelper: Packaging (Windows (64-bit)):
UATHelper: Packaging (Windows (64-bit)): LogShaderCompilers: Display: Started 10 ‘Local’ shader compile jobs with ‘Low’ priority
UATHelper: Packaging (Windows (64-bit)): LogShaderCompilers: Display: Started 10 ‘Local’ shader compile jobs with ‘Low’ priority
UATHelper: Packaging (Windows (64-bit)): LogShaderCompilers: Display: Started 10 ‘Local’ shader compile jobs with ‘Low’ priority
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: begin: stack for UAT
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: === Critical error: ===
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: Assertion failed: SerializeNum >= 0 [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Public\Containers/Array.h] [Line: 1182]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffcfb07466c KERNELBASE.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3d550216 UE4Editor-Core.dll!ReportAssert() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsPlatformCrashContext.cpp:1644]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3d554218 UE4Editor-Core.dll!FWindowsErrorOutputDevice::Serialize() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsErrorOutputDevice.cpp:78]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3d27242d UE4Editor-Core.dll!FOutputDevice::LogfImpl() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\OutputDevice.cpp:61]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3d1c6a45 UE4Editor-Core.dll!AssertFailedImplV() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:104]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3d1c80a0 UE4Editor-Core.dll!FDebug::CheckVerifyFailedImpl() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:461]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffcd33d25b4 UE4Editor-RawMesh.dll!operator<<() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h:1182]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffcd33d1fd0 UE4Editor-RawMesh.dll!operator<<() [D:\Build++UE4\Sync\Engine\Source\Runtime\RawMesh\Private\RawMesh.cpp:206]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffcd33d37bc UE4Editor-RawMesh.dll!FRawMeshBulkData::LoadRawMesh() [D:\Build++UE4\Sync\Engine\Source\Runtime\RawMesh\Private\RawMesh.cpp:276]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3a95e306 UE4Editor-Engine.dll!UStaticMesh::CacheMeshData() [D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:4401]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3a95dd5f UE4Editor-Engine.dll!UStaticMesh::CacheDerivedData() [D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:4591]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3a98761c UE4Editor-Engine.dll!UStaticMesh::PostLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:5071]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3ca8d302 UE4Editor-CoreUObject.dll!UObject::ConditionalPostLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:1092]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3a5b9e82 UE4Editor-Engine.dll!UBodySetup::PostLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\PhysicsEngine\BodySetup.cpp:1199]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3ca8d302 UE4Editor-CoreUObject.dll!UObject::ConditionalPostLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:1092]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3cbbd218 UE4Editor-CoreUObject.dll!EndLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1639]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3cba7897 UE4Editor-CoreUObject.dll!<lambda_fc6dac93f63b3d981a3bc8e7f817eeef>::operator()() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1268]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3cbcceb3 UE4Editor-CoreUObject.dll!LoadPackageInternal() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1374]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3cbcbbc0 UE4Editor-CoreUObject.dll!LoadPackage() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1469]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc373b6cef UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageForCooking() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2098]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc373b6f33 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageInQueue() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1677]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc373c2bd3 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::PumpLoads() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1626]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc373d9856 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::TickCookOnTheSide() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1141]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc3720e6a0 UE4Editor-UnrealEd.dll!UCookCommandlet::CookByTheBook() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:997]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffc37238f4d UE4Editor-UnrealEd.dll!UCookCommandlet::Main() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:663]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff7c490a02c UE4Editor-Cmd.exe!FEngineLoop::PreInitPostStartupScreen() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:3434]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff7c4900d2c UE4Editor-Cmd.exe!GuardedMain() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:132]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff7c49010ba UE4Editor-Cmd.exe!GuardedMainWrapper() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff7c49040dd UE4Editor-Cmd.exe!LaunchWindowsStartup() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:273]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff7c4915984 UE4Editor-Cmd.exe!WinMain() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:320]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff7c49178be UE4Editor-Cmd.exe!__scrt_common_main_seh() [d:\agent_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffcfd1954e0 KERNEL32.DLL!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ffcfd7c485b ntdll.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: end: stack for UAT
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Critical error: ===
PackagingResults: Error: Assertion failed: SerializeNum >= 0 [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Public\Containers/Array.h] [Line: 1182]
PackagingResults: Error: [Callstack] 0x00007ffcfb07466c KERNELBASE.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc3d550216 UE4Editor-Core.dll!ReportAssert() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsPlatformCrashContext.cpp:1644]
PackagingResults: Error: [Callstack] 0x00007ffc3d554218 UE4Editor-Core.dll!FWindowsErrorOutputDevice::Serialize() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsErrorOutputDevice.cpp:78]
PackagingResults: Error: [Callstack] 0x00007ffc3d27242d UE4Editor-Core.dll!FOutputDevice::LogfImpl() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\OutputDevice.cpp:61]
PackagingResults: Error: [Callstack] 0x00007ffc3d1c6a45 UE4Editor-Core.dll!AssertFailedImplV() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:104]
PackagingResults: Error: [Callstack] 0x00007ffc3d1c80a0 UE4Editor-Core.dll!FDebug::CheckVerifyFailedImpl() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:461]
PackagingResults: Error: [Callstack] 0x00007ffcd33d25b4 UE4Editor-RawMesh.dll!operator<<() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h:1182]
PackagingResults: Error: [Callstack] 0x00007ffcd33d1fd0 UE4Editor-RawMesh.dll!operator<<() [D:\Build++UE4\Sync\Engine\Source\Runtime\RawMesh\Private\RawMesh.cpp:206]
PackagingResults: Error: [Callstack] 0x00007ffcd33d37bc UE4Editor-RawMesh.dll!FRawMeshBulkData::LoadRawMesh() [D:\Build++UE4\Sync\Engine\Source\Runtime\RawMesh\Private\RawMesh.cpp:276]
PackagingResults: Error: [Callstack] 0x00007ffc3a95e306 UE4Editor-Engine.dll!UStaticMesh::CacheMeshData() [D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:4401]
PackagingResults: Error: [Callstack] 0x00007ffc3a95dd5f UE4Editor-Engine.dll!UStaticMesh::CacheDerivedData() [D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:4591]
PackagingResults: Error: [Callstack] 0x00007ffc3a98761c UE4Editor-Engine.dll!UStaticMesh::PostLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:5071]
PackagingResults: Error: [Callstack] 0x00007ffc3ca8d302 UE4Editor-CoreUObject.dll!UObject::ConditionalPostLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:1092]
PackagingResults: Error: [Callstack] 0x00007ffc3a5b9e82 UE4Editor-Engine.dll!UBodySetup::PostLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\PhysicsEngine\BodySetup.cpp:1199]
PackagingResults: Error: [Callstack] 0x00007ffc3ca8d302 UE4Editor-CoreUObject.dll!UObject::ConditionalPostLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:1092]
PackagingResults: Error: [Callstack] 0x00007ffc3cbbd218 UE4Editor-CoreUObject.dll!EndLoad() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1639]
PackagingResults: Error: [Callstack] 0x00007ffc3cba7897 UE4Editor-CoreUObject.dll!<lambda_fc6dac93f63b3d981a3bc8e7f817eeef>::operator()() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1268]
PackagingResults: Error: [Callstack] 0x00007ffc3cbcceb3 UE4Editor-CoreUObject.dll!LoadPackageInternal() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1374]
PackagingResults: Error: [Callstack] 0x00007ffc3cbcbbc0 UE4Editor-CoreUObject.dll!LoadPackage() [D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1469]
PackagingResults: Error: [Callstack] 0x00007ffc373b6cef UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageForCooking() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2098]
PackagingResults: Error: [Callstack] 0x00007ffc373b6f33 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageInQueue() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1677]
PackagingResults: Error: [Callstack] 0x00007ffc373c2bd3 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::PumpLoads() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1626]
PackagingResults: Error: [Callstack] 0x00007ffc373d9856 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::TickCookOnTheSide() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1141]
PackagingResults: Error: [Callstack] 0x00007ffc3720e6a0 UE4Editor-UnrealEd.dll!UCookCommandlet::CookByTheBook() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:997]
PackagingResults: Error: [Callstack] 0x00007ffc37238f4d UE4Editor-UnrealEd.dll!UCookCommandlet::Main() [D:\Build++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:663]
PackagingResults: Error: [Callstack] 0x00007ff7c490a02c UE4Editor-Cmd.exe!FEngineLoop::PreInitPostStartupScreen() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:3434]
PackagingResults: Error: [Callstack] 0x00007ff7c4900d2c UE4Editor-Cmd.exe!GuardedMain() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:132]
PackagingResults: Error: [Callstack] 0x00007ff7c49010ba UE4Editor-Cmd.exe!GuardedMainWrapper() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137]
PackagingResults: Error: [Callstack] 0x00007ff7c49040dd UE4Editor-Cmd.exe!LaunchWindowsStartup() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:273]
PackagingResults: Error: [Callstack] 0x00007ff7c4915984 UE4Editor-Cmd.exe!WinMain() [D:\Build++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:320]
PackagingResults: Error: [Callstack] 0x00007ff7c49178be UE4Editor-Cmd.exe!__scrt_common_main_seh() [d:\agent_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
PackagingResults: Error: [Callstack] 0x00007ffcfd1954e0 KERNEL32.DLL!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffcfd7c485b ntdll.dll!UnknownFunction []
PackagingResults: Error: end: stack for UAT
UATHelper: Packaging (Windows (64-bit)): Took 41.8747749s to run UE4Editor-Cmd.exe, ExitCode=3
UATHelper: Packaging (Windows (64-bit)): ERROR: Cook failed.