Please help! Unreal Engine Crashes while loading a level

Hey, I am using Unreal Engine 4.25 but when I try to load my sublevel, unreal engine is always crashing, I tried to look for an answer but I didn’t find one. Here is the crash report:

Assertion failed: Outer != nullptr [File:D:/Build/++UE4+Licensee/Sync/Engine/Source/Runtime/CoreUObject/Private/UObject/UObjectHash.cpp] [Line: 777] Getting objects with a null outer is no longer supported. If you want to get all packages you might consider using GetObjectsOfClass instead.

UE4Editor_Core
UE4Editor_Core
UE4Editor_CoreUObject
UE4Editor_Engine
UE4Editor_WorldBrowser
UE4Editor_WorldBrowser
UE4Editor_WorldBrowser
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
user32
user32
UE4Editor_ApplicationCore
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll

Thanks for your help.