Packaging error unknown

Hi Guys, I have been struggling alot recently on packaging my first game. I have tried looking up the error, but there is no place i can find an answer. If someone out there knows anything related to this … here is my error that then stops the packaging.

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: LoadedWorld [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\LevelActor.cpp] [Line: 1228]

ATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff88ad9a388 KERNELBASE.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff85b461f07 UE4Editor-Core.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff85b4646b7 UE4Editor-Core.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff85b277cea UE4Editor-Core.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff85b1ffe07 UE4Editor-Core.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff85b200499 UE4Editor-Core.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff82a45c5a9 UE4Editor-Engine.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff851de907e UE4Editor-UnrealEd.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff851dedfd5 UE4Editor-UnrealEd.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff851e070ec UE4Editor-UnrealEd.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff851ca2395 UE4Editor-UnrealEd.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff851cce844 UE4Editor-UnrealEd.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff6f8abe402 UE4Editor-Cmd.exe!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff6f8ab5377 UE4Editor-Cmd.exe!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff6f8ab55ca UE4Editor-Cmd.exe!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff6f8ac316c UE4Editor-Cmd.exe!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff6f8ac4cb6 UE4Editor-Cmd.exe!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff88bb94034 KERNEL32.DLL!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00007ff88dfc3691 ntdll.dll!UnknownFunction []

UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: end: stack for UAT