Cant start game | Project Zomboid | Page 1

main hollow Mar 9, 2026, 11:50 PM

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After the new update my game crashes immediately when trying to launch it

cursive phoenix Mar 9, 2026, 11:57 PM

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From what i've gathered it could be the mods installed are creating this issue, as its a new patch, im having the same issue

frosty vine Mar 10, 2026, 2:41 AM

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I had to unsubscribe from all workshop mods and verify game files.

main hollow Mar 10, 2026, 3:50 PM

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i have unsubbed from all mods verified game files and reinstalled the game still hard crashes on startup

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📎 console.txt

frosty vine Mar 10, 2026, 4:18 PM

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ERROR: General      f:0, t:1773157753896> ExceptionLogger.logException> Exception thrown
    java.lang.NoClassDefFoundError: zombie/iso/MultiStageBuilding at LuaManager$Exposer.exposeAll(LuaManager.java:2525). Message: Unhandled java.lang.NoClassDefFoundError thrown by thread MainThread.
    Stack trace:
        zombie.Lua.LuaManager$Exposer.exposeAll(LuaManager.java:2525)
        zombie.Lua.LuaManager.init(LuaManager.java:1223)
        zombie.GameWindow.init(GameWindow.java:1153)
        zombie.GameWindow.mainThreadInit(GameWindow.java:671)
        zombie.GameWindow.mainThreadStart(GameWindow.java:542)
        zombie.MainThread.mainLoop(MainThread.java:58)
        java.base/java.lang.Thread.run(Unknown Source)
    Caused by: java.lang.ClassNotFoundException: zombie.iso.MultiStageBuilding
        java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
        java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        ... 7 more
LOG  : General      f:0, t:1773157753897> GameThread exited.
ERROR: General      f:0, t:1773157753897> MainThread.uncaughtException        >   Notifying InvokeOnMainQueue...```

You're missing core game files. You'll need to go to `C:/Program Files (x86)/Steam/steamapps/common` and delete the entire `108600` folder. Once you've done that, verify integrity and try to open it when the reinstall completes. This ensures a clean installation.

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I'd also recommend going to Steam/steamapps/workshop/content/108600 and deleting any leftover workshop files.

main hollow Mar 10, 2026, 4:52 PM

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frosty vine ```ERROR: General f:0, t:1773157753895> GameWindow.uncaughtException ...

just did all of this and still having the same issue

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not sure if you need to see this again

📎 console.txt

undone mango Mar 10, 2026, 5:57 PM

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Can you try doing a full reinstall?
First, uninstall the game, then go to "Steam\steamapps\common\ProjectZomboid" and make sure there are no leftover files or folders there.
After that, go to “%UserProfile%\Zomboid” and delete everything there except the “Saves” folder.
Then just install the game again and see if that helps.

It is important to delete the files manually after the uninstall, Steam often keeps leftovers, causing issues. Standard reinstall as you did will not help in such cases

main hollow Mar 10, 2026, 6:29 PM

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I will try this soon when I’m back home and let you know if it fixes thank yall for all of the help

#Cant start game