-null- Core.errors.open Failed Mortal Kombat __link__ · Original

Close the game and Steam/Epic launcher.

The -null- core.errors.open failed error in Mortal Kombat is terrifying because of the code, but treat it like a simple "Access Denied" sign. Most likely, your antivirus is putting the game in a chokehold, or your shader cache is rotten. -null- core.errors.open failed mortal kombat

If the game cannot write to its own directory because of permission issues, running it as an admin can bypass the block. Close the game and Steam/Epic launcher