So, I don't know where to put this, and decided to post here...

So, recently i got a betatester to test my project, and yesterday he found a bug, he was playing in Win11, So i don’t got any idea of what’s happening.

Cuz I play my own build, and everythings is alright.
any help?

No idea. Given similar error I have encountered though I would guess plugin conflict. Normally I would to to disable all plugins and activating the one by one to figure out the culprit. But this will be difficult if you yourself do not get this error.

Edit. Asking Gemini to identify the issue, it seems the issue is connected to a plugin called Khas Ultra Lightning.Js. i have no clue if this is actually accurate, being from an ai and all. I literally know nothing about coding. But I hope it helps.

​The Core Problem

TypeError: Cannot read property ‘blendModes’ of undefined

​In plain English, the game’s code is trying to look up a list of visual blending options (like multiply, screen, or overlay effects), but the object that is supposed to hold those options doesn’t exist (undefined).

​Why It’s Happening

​Looking down the stack trace, we can see exactly who is arguing:

  • KhasUltraLighting.js: This is a popular custom script used to handle dynamic lighting, shadows, and torch effects in RPG Maker MV.
  • rpg_core.js / PIXI framework: RPG Maker MV relies on an underlying HTML5 graphics engine called PixiJS.

​The lighting plugin (KhasUltraLighting) is trying to read PIXI’s rendering properties during the game’s startup sequence (_createRenderer). Because it’s finding undefined, it means the version of PixiJS used by the game is incompatible with this specific version of the lighting script.

​Common Causes & Fixes

​If you are playing the game:

  • Outdated Game Files: The developer might have updated their core game files but forgot to update the lighting plugin (or vice versa). You’ll likely need to wait for a developer patch.
  • Corrupted Install: Sometimes a missing core file causes the engine to fail to initialize properly. Re-downloading or verifying the game files can sometimes fix it.

​If you are developing the game:

  • PIXI.js Version Mismatch: If you recently updated your game’s engine version (e.g., updating RPG Maker MV from an older version to 1.6+), the version of PixiJS changed. Khas’s older lighting scripts are notorious for breaking on newer MV engine versions because PIXI restructured how it handles canvas renderers and blend modes. You may need to look for a community compatibility patch for Khas’s script or downgrade your project’s core scripts.
  • Plugin Order: Ensure KhasCore.js is placed above KhasUltraLighting.js in your Plugin Manager, and check if it needs to be placed relative to Yanfly’s Core Engine (YEP_CoreEngine.js), which is also running here.
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That was strange, i recently played with my own build of the game, touching the “Compability stuff” on game.exe, and i noticed the game can’t works on WinXP/Vista, any other versions is everything OK. that was really strange for me.


(Again, sorry for my bad english.)

Maybe you can mention in the description that the game doesn’t work on those platforms. I have no clue for why those plugins are in conflict only on some versions of windows.

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Until i can get enough info to fix that, the Game cannot work on W11, at least it doesn’,t have the compatibility…