To avoid re-seeing “null coreerrorsopen failed” after a new MK patch:
The "new" in the search keyword often refers to a or new DLC character causing the crash. The Core.Errors.OpenFailed error is notoriously common in the modding community for Mortal Kombat 9 (Komplete Edition) . Mod authors have confirmed that this specific error occurs when a mod incorrectly references a character file, has a file naming mismatch, or when the game attempts to load a "Null" or empty file path.
: This is the most effective fix. It forces Steam to redownload missing or corrupted files (often about 28.8MB of data that commonly fails to install). Right-click Mortal Kombat Komplete Edition in your Steam Library. Properties Installed Files Local Files null coreerrorsopen failed mortal kombat new
folder. The game will regenerate a default version on the next launch. Delete Local AppData , some users find success by deleting the folder at C:\Users\[Username]\AppData\Local\MK11 4. Troubleshooting for MK Mobile For mobile users encountering "Open Fail" bugs:
Obsolete NVIDIA or AMD drivers cannot properly initialize the game's engine. To avoid re-seeing “null coreerrorsopen failed” after a
The game attempts to call high-definition video files or audio sequences that were partially corrupted during download.
Alternatively, open dxdiag.txt within that folder and ensure your dedicated GPU configuration values match your actual monitor's default refresh rates and dimensions. 4. Enable or Install Missing Story/DLC Content Assets Mortal Kombat Komplete Edition General Discussions : This is the most effective fix
Allow the verification sequence to reach 100% before launching the executable file again. Step-by-Step Fixes for Mobile (Android & iOS)
On Chapert 15: Nightwolf, after defeat Quan Chi when starts the cutscene the game just close and appear this error: How to fix it? Steam Community How To Fix A Game Not Running On Steam Deck