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Engine Crash when pressing play

Hi, whenever I try to press play the engine crashes. The first time I got the error is when I tried packaging the menu map but then I tried also to package other maps and I got the same problems. Today when I tried to press the play button it’s started crashing with the error “Runnable thread StallDetectorThread crashed.”
I tried to compile all blueprints from the command prompt but I didn’t get any errors.

This is the crash log:

Assertion failed: Child [File:D:/build/++UE5/Sync/Engine/Source/Runtime/CoreUObject/Private/UObject/UObjectGlobals.cpp] [Line: 3308] NewObject called with a nullptr class object

UnrealEditor_CoreUObject
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll