Crashing when launching project.

Since this morning, when I got to open one of my projects, it crashes and leaves me with this message. I see that other people have had this same issue, but cant find a solution… Please help!

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000028

UnrealEditorFortnite_Win64_Shipping
UnrealEditorFortnite_Win64_Shipping
UnrealEditorFortnite_Win64_Shipping
UnrealEditorFortnite_Win64_Shipping
UnrealEditorFortnite_Win64_Shipping
UnrealEditorFortnite_Win64_Shipping
kernel32
ntdll