Error when packaging for windows x64

We are having problems packaging our project. We are using ue4 4.18 Preview.

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: InParent == nullptr || !InParent->IsAttachedTo(this) [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Engine\Private\Components\SceneComponent.cpp] [Line: 1599]
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: Setting up attachment would create a cycle.
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: Stack:
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000003C9522A6 UE4Editor-Core.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000003C6F1222 UE4Editor-Core.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000003C70B846 UE4Editor-Core.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000003A188039 UE4Editor-Engine.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000039C6C817 UE4Editor-Engine.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000003970E5DC UE4Editor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000397CD61C UE4Editor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000397E4DB9 UE4Editor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000397E42D4 UE4Editor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000037796643 UE4Editor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000377CD4EB UE4Editor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000037667D61 UE4Editor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000003768F391 UE4Editor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000951FD25F UE4Editor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000951F525A UE4Editor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00000000951F54AA UE4Editor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000095202379 UE4Editor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x0000000095203193 UE4Editor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000007E4C2774 KERNEL32.DLL!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: [Callstack] 0x000000007EF40D51 ntdll.dll!UnknownFunction []
UATHelper: Packaging (Windows (64-bit)):   LogInit: Display: LogOutputDevice: Error: end: stack for UAT

All errors are from UE4Editor-___.dll!UnknownFunction [], what can I do?

I dont remember well, but I think the problem was that we was working in two version at the same time… and we try to package using a lower version (it was a beta version).

We just had to use a backup and repeat the work…

I am having the same problem. Did you ever end up finding a solution?