Unknown Cook Failure - Ensure condition failed:

My game is working perfect on editor play. But when i cooked x64 windows development build i got this error:

UATHelper: Packaging (Windows (64-bit)):    UATHelper: Packaging (Windows (64-bit)):   Script Stack (0 frames): UATHelper: Packaging (Windows (64-bit)):    UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: begin: stack for UAT UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: === Handled ensure: === UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: Ensure condition failed: ReferencingPin->LinkedTo.Num() > PinData.ArrayIdx [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/EdGraph/EdGraphPin.cpp] [Line: 1742] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: Stack: UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffcfd8cafd9 UE4Editor-Engine.dll!<lambda_349797355268f6f8397ebed4c7667522>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1742] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffcfc58d347 UE4Editor-Engine.dll!UEdGraphPin::ResolveReferencesToPin() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1742] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffcfc5910f6 UE4Editor-Engine.dll!UEdGraphPin::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1700] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffcfc591de9 UE4Editor-Engine.dll!UEdGraphPin::SerializePin() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:2017] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffcfc5921b7 UE4Editor-Engine.dll!UEdGraphPin::SerializePinArray() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1820] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd0afe1ee8 UE4Editor-BlueprintGraph.dll!UK2Node::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node.cpp:131] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd0afe234c UE4Editor-BlueprintGraph.dll!UK2Node_CallFunction::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node_CallFunction.cpp:2192] PackagingResults: Error: begin: stack for UAT UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd384a2259 UE4Editor-CoreUObject.dll!FLinkerLoad::Preload() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4073] PackagingResults: Error: === Handled ensure: === UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd38618421 UE4Editor-CoreUObject.dll!EndLoad() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1589] PackagingResults: Error: Ensure condition failed: ReferencingPin->LinkedTo.Num() > PinData.ArrayIdx [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/EdGraph/EdGraphPin.cpp] [Line: 1742] PackagingResults: Error: Stack: PackagingResults: Error: [Callstack] 0x00007ffcfd8cafd9 UE4Editor-Engine.dll!<lambda_349797355268f6f8397ebed4c7667522>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1742] PackagingResults: Error: [Callstack] 0x00007ffcfc58d347 UE4Editor-Engine.dll!UEdGraphPin::ResolveReferencesToPin() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1742] PackagingResults: Error: [Callstack] 0x00007ffcfc5910f6 UE4Editor-Engine.dll!UEdGraphPin::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1700] PackagingResults: Error: [Callstack] 0x00007ffcfc591de9 UE4Editor-Engine.dll!UEdGraphPin::SerializePin() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:2017] PackagingResults: Error: [Callstack] 0x00007ffcfc5921b7 UE4Editor-Engine.dll!UEdGraphPin::SerializePinArray() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1820] PackagingResults: Error: [Callstack] 0x00007ffd0afe1ee8 UE4Editor-BlueprintGraph.dll!UK2Node::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node.cpp:131] PackagingResults: Error: [Callstack] 0x00007ffd0afe234c UE4Editor-BlueprintGraph.dll!UK2Node_CallFunction::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node_CallFunction.cpp:2192] PackagingResults: Error: [Callstack] 0x00007ffd384a2259 UE4Editor-CoreUObject.dll!FLinkerLoad::Preload() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4073] PackagingResults: Error: [Callstack] 0x00007ffd38618421 UE4Editor-CoreUObject.dll!EndLoad() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1589] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd386097e7 UE4Editor-CoreUObject.dll!<lambda_94537a9bd809517493790f80316e3165>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1257] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd38628edd UE4Editor-CoreUObject.dll!LoadPackageInternal() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1290] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd38627f30 UE4Editor-CoreUObject.dll!LoadPackage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1458] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd33f56c4f UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageForCooking() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2086] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd33f56e93 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageInQueue() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1665] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd33f62a03 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::PumpLoads() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1614] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd33f791a6 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::TickCookOnTheSide() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1129] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd33db5dfd UE4Editor-UnrealEd.dll!UCookCommandlet::CookByTheBook() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:950] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd33ddfc9a UE4Editor-UnrealEd.dll!UCookCommandlet::Main() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:624] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ff7cef79a29 UE4Editor-Cmd.exe!FEngineLoop::PreInitPostStartupScreen() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:3369] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ff7cef70eec UE4Editor-Cmd.exe!GuardedMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:127] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ff7cef7125a UE4Editor-Cmd.exe!GuardedMainWrapper() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ff7cef852bd UE4Editor-Cmd.exe!WinMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ff7cef8736e 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)):   LogOutputDevice: Error: [Callstack] 0x00007ffd95eb7034 KERNEL32.DLL!UnknownFunction [] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffd96f02651 ntdll.dll!UnknownFunction [] UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: UATHelper: Packaging (Windows (64-bit)):   LogOutputDevice: Error: end: stack for UAT PackagingResults: Error: [Callstack] 0x00007ffd386097e7 UE4Editor-CoreUObject.dll!<lambda_94537a9bd809517493790f80316e3165>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1257] PackagingResults: Error: [Callstack] 0x00007ffd38628edd UE4Editor-CoreUObject.dll!LoadPackageInternal() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1290] PackagingResults: Error: [Callstack] 0x00007ffd38627f30 UE4Editor-CoreUObject.dll!LoadPackage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1458] PackagingResults: Error: [Callstack] 0x00007ffd33f56c4f UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageForCooking() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2086] PackagingResults: Error: [Callstack] 0x00007ffd33f56e93 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageInQueue() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1665] PackagingResults: Error: [Callstack] 0x00007ffd33f62a03 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::PumpLoads() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1614] PackagingResults: Error: [Callstack] 0x00007ffd33f791a6 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::TickCookOnTheSide() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1129] PackagingResults: Error: [Callstack] 0x00007ffd33db5dfd UE4Editor-UnrealEd.dll!UCookCommandlet::CookByTheBook() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:950] PackagingResults: Error: [Callstack] 0x00007ffd33ddfc9a UE4Editor-UnrealEd.dll!UCookCommandlet::Main() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:624] PackagingResults: Error: [Callstack] 0x00007ff7cef79a29 UE4Editor-Cmd.exe!FEngineLoop::PreInitPostStartupScreen() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:3369] PackagingResults: Error: [Callstack] 0x00007ff7cef70eec UE4Editor-Cmd.exe!GuardedMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:127] PackagingResults: Error: [Callstack] 0x00007ff7cef7125a UE4Editor-Cmd.exe!GuardedMainWrapper() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137] PackagingResults: Error: [Callstack] 0x00007ff7cef852bd UE4Editor-Cmd.exe!WinMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268] PackagingResults: Error: [Callstack] 0x00007ff7cef8736e 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] 0x00007ffd95eb7034 KERNEL32.DLL!UnknownFunction [] PackagingResults: Error: [Callstack] 0x00007ffd96f02651 ntdll.dll!UnknownFunction [] PackagingResults: Error: end: stack for UAT 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: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000 UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffcfc58d481 UE4Editor-Engine.dll!UEdGraphPin::ResolveReferencesToPin() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1759] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffcfc5910f6 UE4Editor-Engine.dll!UEdGraphPin::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1700] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffcfc591de9 UE4Editor-Engine.dll!UEdGraphPin::SerializePin() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:2017] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffcfc5921b7 UE4Editor-Engine.dll!UEdGraphPin::SerializePinArray() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1820] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd0afe1ee8 UE4Editor-BlueprintGraph.dll!UK2Node::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node.cpp:131] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd0afe234c UE4Editor-BlueprintGraph.dll!UK2Node_CallFunction::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node_CallFunction.cpp:2192] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd384a2259 UE4Editor-CoreUObject.dll!FLinkerLoad::Preload() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4073] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd38618421 UE4Editor-CoreUObject.dll!EndLoad() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1589] PackagingResults: Error: begin: stack for UAT UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd386097e7 UE4Editor-CoreUObject.dll!<lambda_94537a9bd809517493790f80316e3165>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1257] PackagingResults: Error: === Critical error: === PackagingResults: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000 PackagingResults: Error: [Callstack] 0x00007ffcfc58d481 UE4Editor-Engine.dll!UEdGraphPin::ResolveReferencesToPin() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1759] PackagingResults: Error: [Callstack] 0x00007ffcfc5910f6 UE4Editor-Engine.dll!UEdGraphPin::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1700] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd38628edd UE4Editor-CoreUObject.dll!LoadPackageInternal() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1290] PackagingResults: Error: [Callstack] 0x00007ffcfc591de9 UE4Editor-Engine.dll!UEdGraphPin::SerializePin() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:2017] PackagingResults: Error: [Callstack] 0x00007ffcfc5921b7 UE4Editor-Engine.dll!UEdGraphPin::SerializePinArray() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Engine\Private\EdGraph\EdGraphPin.cpp:1820] PackagingResults: Error: [Callstack] 0x00007ffd0afe1ee8 UE4Editor-BlueprintGraph.dll!UK2Node::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node.cpp:131] PackagingResults: Error: [Callstack] 0x00007ffd0afe234c UE4Editor-BlueprintGraph.dll!UK2Node_CallFunction::Serialize() [D:\Build\++UE4\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node_CallFunction.cpp:2192] PackagingResults: Error: [Callstack] 0x00007ffd384a2259 UE4Editor-CoreUObject.dll!FLinkerLoad::Preload() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4073] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd38627f30 UE4Editor-CoreUObject.dll!LoadPackage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1458] PackagingResults: Error: [Callstack] 0x00007ffd38618421 UE4Editor-CoreUObject.dll!EndLoad() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1589] PackagingResults: Error: [Callstack] 0x00007ffd386097e7 UE4Editor-CoreUObject.dll!<lambda_94537a9bd809517493790f80316e3165>::operator()() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1257] PackagingResults: Error: [Callstack] 0x00007ffd38628edd UE4Editor-CoreUObject.dll!LoadPackageInternal() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1290] PackagingResults: Error: [Callstack] 0x00007ffd38627f30 UE4Editor-CoreUObject.dll!LoadPackage() [D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1458] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd33f56c4f UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageForCooking() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2086] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd33f56e93 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageInQueue() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1665] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd33f62a03 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::PumpLoads() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1614] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd33f791a6 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::TickCookOnTheSide() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1129] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd33db5dfd UE4Editor-UnrealEd.dll!UCookCommandlet::CookByTheBook() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:950] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd33ddfc9a UE4Editor-UnrealEd.dll!UCookCommandlet::Main() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:624] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ff7cef79a29 UE4Editor-Cmd.exe!FEngineLoop::PreInitPostStartupScreen() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:3369] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ff7cef70eec UE4Editor-Cmd.exe!GuardedMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:127] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ff7cef7125a 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] 0x00007ff7cef852bd UE4Editor-Cmd.exe!WinMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ff7cef8736e 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] 0x00007ffd95eb7034 KERNEL32.DLL!UnknownFunction [] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: [Callstack] 0x00007ffd96f02651 ntdll.dll!UnknownFunction [] UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: UATHelper: Packaging (Windows (64-bit)):   LogWindows: Error: end: stack for UAT PackagingResults: Error: [Callstack] 0x00007ffd33f56c4f UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageForCooking() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:2086] PackagingResults: Error: [Callstack] 0x00007ffd33f56e93 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::LoadPackageInQueue() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1665] PackagingResults: Error: [Callstack] 0x00007ffd33f62a03 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::PumpLoads() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1614] PackagingResults: Error: [Callstack] 0x00007ffd33f791a6 UE4Editor-UnrealEd.dll!UCookOnTheFlyServer::TickCookOnTheSide() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\CookOnTheFlyServer.cpp:1129] PackagingResults: Error: [Callstack] 0x00007ffd33db5dfd UE4Editor-UnrealEd.dll!UCookCommandlet::CookByTheBook() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:950] PackagingResults: Error: [Callstack] 0x00007ffd33ddfc9a UE4Editor-UnrealEd.dll!UCookCommandlet::Main() [D:\Build\++UE4\Sync\Engine\Source\Editor\UnrealEd\Private\Commandlets\CookCommandlet.cpp:624] PackagingResults: Error: [Callstack] 0x00007ff7cef79a29 UE4Editor-Cmd.exe!FEngineLoop::PreInitPostStartupScreen() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:3369] PackagingResults: Error: [Callstack] 0x00007ff7cef70eec UE4Editor-Cmd.exe!GuardedMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:127] PackagingResults: Error: [Callstack] 0x00007ff7cef7125a UE4Editor-Cmd.exe!GuardedMainWrapper() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137] PackagingResults: Error: [Callstack] 0x00007ff7cef852bd UE4Editor-Cmd.exe!WinMain() [D:\Build\++UE4\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268] PackagingResults: Error: [Callstack] 0x00007ff7cef8736e 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] 0x00007ffd95eb7034 KERNEL32.DLL!UnknownFunction [] PackagingResults: Error: [Callstack] 0x00007ffd96f02651 ntdll.dll!UnknownFunction [] PackagingResults: Error: end: stack for UAT UATHelper: Packaging (Windows (64-bit)): Took 51,3431318s to run UE4Editor-Cmd.exe, ExitCode=3 UATHelper: Packaging (Windows (64-bit)): ERROR: Cook failed. UATHelper: Packaging (Windows (64-bit)):        (see C:\Users\ONURHAN AKCAY\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.26\Log.txt for full exception trace) PackagingResults: Error: Cook failed. UATHelper: Packaging (Windows (64-bit)): AutomationTool exiting with ExitCode=25 (Error_UnknownCookFailure) UATHelper: Packaging (Windows (64-bit)): BUILD FAILED PackagingResults: Error: Unknown Cook Failure

I examined all the codes one by one, but I could not find where the error came from. Do you have a solution suggestion?

bump. experiencing the same