The problem of the form "Error: [Callstack] *your hexadecimal number* UnrealEditor-CoreUObject.dll!UnknownFunction []"

oh ive been through my own stuff too, don’t worry. (imho) is not about not going through shtuff, is about coming out the other way.
i was just curious whether you tried that or not.
i’m glad you found your solution and thanks for sharing it.