UE4 4.26.2 Fatal Error packaged build, Assertion Failed: Result [File:Runtime\CoreUObject\Public\UObject/Stack.h] [Line:250]

Hi, when I open a map in my packaged built, a fatal error with the following description is shown up on my screen:
Assertion Failed: Result [File:Runtime\CoreUObject\Public\UObject/Stack.h] [Line:250]

what do you think about it and how should I fix it? thank you.

I’m so stuck at this error guys so if u can help even a bit, please help…