: Security software frequently flags mod engines like BepInEx as false positives. Add your entire Koikatsu installation folder to your antivirus exclusion list.
Run the game executable ( Koikatu.exe or Koikatsu Party.exe ) as an . 6. Repairing Corrupted Game Files If you are using the Steam version (Koikatsu Party): Open your Steam Library. Right-click the game and select Properties .
Koikatsu cards store custom data. If a card requires a zipmod ( .zipmod file inside mods/ ) that is missing or corrupt, the game will crash during thumbnail generation.
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If your game hangs indefinitely at launch, especially after installing new mods, : the first start after installing mods can take a very long time, especially if the game is installed on a slower HDD.
Ultimate Koikatsu Crash Fix Guide: How to Stop Crashing on Launch, Loading, and Modding
Repeat this process (binary search) to find the specific plugin causing the crash. B. The "KK_Fix" Strategy
: Some plugins cache character data. Delete the cache folder located inside your BepInEx directory to force the game to rebuild asset paths cleanly.
Go to your Koikatsu root folder and open BepInEx/config/BepInEx.cfg using Notepad.
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