Packaging Error UE 5.2 (Array index out of bounds)

I’m using UE 5.2, currently trying to package a decently sized project.
I have packaged the project at one point and it worked fine but this was around 8 months ago and the project is much larger now.

My PC has a old i7 CPU if this is relevant. Don’t know if it’s a hardware issue or a technical issue from a BP.

Here is the error:

LogWindows: Error: appError called: Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 752] 
Array index out of bounds: 0 from an array of size 0

LogWindows: Windows GetLastError: Operasjonen er utført. (0)
LogWindows: Error: begin: stack for UAT
LogWindows: Error: === Critical error: ===
LogWindows: Error: 
LogWindows: Error: Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 752] 
LogWindows: Error: Array index out of bounds: 0 from an array of size 0
LogWindows: Error: 
LogWindows: Error: 
LogWindows: Error: [Callstack] 0x00007ff99655598b UnrealEditor-Engine.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff9965532c9 UnrealEditor-Engine.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff996553e1f UnrealEditor-Engine.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff996551f15 UnrealEditor-Engine.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff998df40f2 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff998de88c9 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff998deaab9 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff998e018e5 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff998e01b06 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff9916c4558 UnrealEditor-UnrealEd.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff9914bd9ef UnrealEditor-UnrealEd.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff9914af3e9 UnrealEditor-UnrealEd.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff9914c6118 UnrealEditor-UnrealEd.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff9914c5a3a UnrealEditor-UnrealEd.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff991205312 UnrealEditor-UnrealEd.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff9912243b1 UnrealEditor-UnrealEd.dll!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff6a651d0de UnrealEditor-Cmd.exe!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff6a651454b UnrealEditor-Cmd.exe!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff6a651482a UnrealEditor-Cmd.exe!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff6a65174f0 UnrealEditor-Cmd.exe!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff6a652a4c4 UnrealEditor-Cmd.exe!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ff6a652cb76 UnrealEditor-Cmd.exe!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ffa4bdf7374 KERNEL32.DLL!UnknownFunction []
LogWindows: Error: [Callstack] 0x00007ffa4d81cc91 ntdll.dll!UnknownFunction []
LogWindows: Error: 
LogWindows: Error: end: stack for UAT
LogExit: Executing StaticShutdownAfterError
LogWindows: FPlatformMisc::RequestExit(1)
LogWindows: FPlatformMisc::RequestExitWithStatus(1, 3)
LogCore: Engine exit requested (reason: Win RequestExit)

Anybody have a clue? Been scratching my head for almost a week now.