Packaging error - Never seen this

My output log:

UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: begin: stack for UAT
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: === Handled ensure: ===
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error:
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: Ensure condition failed: !DoesContainTransformCurves() || (RawAnimationData.Num()==0 || SourceRawAnimationData.Num() != 0) [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Engine\Private\Animation\AnimSequence.cpp] [Line: 371]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: Stack:
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000912CB706 UE4Editor-Core.dll!FWindowsPlatformStackWalk::StackWalkAndDump() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\windows\windowsplatformstackwalk.cpp:234]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000009102AE3A UE4Editor-Core.dll!FDebug::EnsureFailed() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:299]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000009103ECD6 UE4Editor-Core.dll!FDebug::OptionallyLogFormattedEnsureMessageReturningFalse() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:430]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000007222519B UE4Editor-Engine.dll!UAnimSequence::PreSave() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\engine\private\animation\animsequence.cpp:371]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000008C28BDE7 UE4Editor-CoreUObject.dll!FPackageExportTagger::TagPackageExports() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\savepackage.cpp:2812]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000008C274540 UE4Editor-CoreUObject.dll!UPackage::Save() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\savepackage.cpp:3626]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000070795264 UE4Editor-UnrealEd.dll!UEditorEngine::Save() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:4390]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000007063EEEB UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::SaveCookedPackage() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:3260]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000007064022D UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::SaveCookedPackages() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:2310]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000007064BC59 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::TickCookOnTheSide() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:1773]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000704FA580 UE4Editor-UnrealEd.dll!UCookCommandlet::CookByTheBook() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\commandlets\cookcommandlet.cpp:904]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000070521CB0 UE4Editor-UnrealEd.dll!UCookCommandlet::Main() [d:\build\++ue4+release-4.19+compile\sync\engine\source\editor\unrealed\private\commandlets\cookcommandlet.cpp:584]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000075BAEB20 UE4Editor-Cmd.exe!FEngineLoop::PreInit() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2195]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000075BA69FA UE4Editor-Cmd.exe!GuardedMain() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\launch.cpp:127]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000075BA6C4A UE4Editor-Cmd.exe!GuardedMainWrapper() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:144]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000075BB4177 UE4Editor-Cmd.exe!WinMain() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:223]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000075BB4FBF UE4Editor-Cmd.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000BE873034 KERNEL32.DLL!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000BE9C1551 ntdll.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: end: stack for UAT

I’ve never had this problem with any other project before. I have tried

  • Migrating to a blank project
  • Fixing up redirectors
  • Validating assets
  • Changing build configuration to shipping

Any help would be appreciated as I’m ready to test the online aspect but can’t package to send to a tester. Thanks