If you’ve landed on this page, you likely have just installed a new Mortal Kombat game— Mortal Kombat 1 (the reboot) or MK11 —only to be greeted by a cryptic error box that reads something like: or "Fatal error: CoreErrorsOpen failed – Null core from stream" This error typically appears at launch, before the game even shows the logos, or crashes immediately after the splash screen. It is not a standard Windows error; it’s an internal Unreal Engine 3 or 4 error (depending on the game) related to how the game reads its core configuration files.
Below, we break down exactly what “null coreerrorsopen failed” means, why it happens specifically with “new” installations or updates, and provide 8 proven solutions. In Mortal Kombat PC ports (especially MKX and MK11), the game engine initializes a “core” set of data—localization files, config paths, and engine parameters. The CoreErrorsOpen function attempts to open the error-logging subsystem. null coreerrorsopen failed mortal kombat new
Last Updated: 2026 Affected Games: Mortal Kombat 1 (2023), Mortal Kombat 11, Mortal Kombat X Platforms: PC (Steam, Epic Games) If you’ve landed on this page, you likely
→ (And by that, we mean finish the error.) In Mortal Kombat PC ports (especially MKX and
A error means the engine tried to access a core configuration object, but that object was empty (null). “Open failed” indicates the game couldn’t read a necessary .ini or .cfg file.