hi guys i am workin in this game and today i open my project in ue4 and i get this error i dont knew how i fix it pls help me i cant imagin all this work go to nothing

Development Programming & Scripting Blueprint
,
1

Assertion failed: NumBytes == Strings.Num() [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Core/Private/UObject/UnrealNames.cpp] [Line: 3336]

UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_AssetRegistry
UE4Editor_AssetRegistry
UE4Editor_Core
UE4Editor_Core
kernel32
ntdll

2

Is it a c++ or a bp project?

If BP try deleting all non-essential folders:
DerivedDataCache, Intermediate and Save. Then open the project.

If C++, then a few extra steps are necessary.