If you recently installed a mod that caused the crash, you may need to clear the cache. Go to your VintagestoryData folder. Locate the Mods folder and remove recently added mods.
They are pulling classes defined inside VintagestoryLib.dll . Without this file present in the game’s directory, no mod can load, because the game itself cannot resolve the fundamental types required to run. VintagestoryLib.dll
Errors involving VintagestoryLib.dll often arise when the game's executable ( Vintagestory.exe ) cannot load the file properly or when the file itself is corrupted or missing. As of 2026, typical causes include: If you recently installed a mod that caused
VintagestoryLib.dll is the closed-source "engine" that powers much of the game's core logic—handling everything from networking and physics to world saving—posts about it usually fall into one of two camps: technical modding deep-dives troubleshooting guides They are pulling classes defined inside VintagestoryLib
A mod was compiled with a reference to a different path or a different version of the DLL than the one present.
For modders, VintagestoryLib.dll is the ultimate reference file. Because the source code is not public, advanced modders use tools like or ILSpy to decompile the library to understand how to hook into the engine or create new systems.