UE4.26.2 Cooking Error | Help with debugging

The project won’t cook.
The output log returns many lines of errors with no indication as to where the error might occur:

UATHelper: Cooking (Windows (64-bit)):   LogOutputDevice: Error: Ensure condition failed: !FPackageName::IsShortPackageName(Path) [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/CoreUObject/Private/UObject/SoftObjectPath.cpp] [Line: 79]
UATHelper: Cooking (Windows (64-bit)):   LogOutputDevice: Error: Cannot create SoftObjectPath with short package name 'False'! You must pass in fully qualified package names
UATHelper: Cooking (Windows (64-bit)):   LogOutputDevice: Error: Stack:
UATHelper: Cooking (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffaf82b1909 UE4Editor-CoreUObject.dll!UnknownFunction []
UATHelper: Cooking (Windows (64-bit)):   LogOutputDevice: Error: [Callstack] 0x00007ffaf8188b7c UE4Editor-CoreUObject.dll!UnknownFunction []
ect. 

I followed a solution provided here: https://www.reddit.com/r/unrealengine/comments/l8qaa4/comment/gql11k9/
and here
Error when packaging - UE4 AnswerHub

but didn’t get the Blueprint and variable names.

All I got is this:
Step 9 tooltip: step09v2 — ImgBB
Step 12 tooltip: step12v2 — ImgBB

The problem is, I don’t know how to go about looking for the error in debugger. I’ve seen almost all Youtube tutorials about UE and VS, tried different stuff and still can’t figure it out.

Any idea in which direction should I look?