In simple terms, UI Error 27393 is a memory access violation specific to the Black Ops 3 user interface system. The game’s UI engine attempts to read or write to a memory location that it does not have permission to access. This is rarely a hardware failure (your RAM is likely fine); instead, it is a conflict between how the game manages assets and how your operating system or drivers handle those requests.
This usually appears in the main menu or immediately after attempting to search for a match. In many cases, the player appears to be stuck in a "Private Match" lobby state or is unable to load their rank and unlocks. ui error 27393 black ops 3
: Some users report that the error specifically triggers when pressing "Esc." Completing the current mission/chapter without pausing can sometimes "reset" the UI for future levels Steam Community Steam Achievement Manager : A known community fix involves using the Steam Achievement Manager In simple terms, UI Error 27393 is a