So you should check out this thread talking about “null pointer errors” (that’s what 0x0000000000000000 is).
Is this happening when you try to open UNREAL ENGINE or when you try to RUN your game? If it’s happening with the Editor I strongly suggest a reinstallation. If it’s the game you’re making you will have to look for any null references, or variables being utilized that should have a value that do not.