Close the Minecraft Launcher and the game if they are running. Run the you downloaded. Select the Client tab. Set the Minecraft Version to 1.16.5 .

Download the universal installer (.jar) or Windows installer (.exe). FabricMC.net Fabric API for 1.16.5: Source: CurseForge Note: Without the Fabric API, Wurst will crash on startup. Step 2: Install Fabric Loader

Set the to the latest available (usually the default). Ensure "Create profile" is checked and click Install . Step 3: Locate the Minecraft Mods Folder

You need to place the Wurst jar and the Fabric API jar into your game's directory.

Ensure you are using Java 8 or 16 (standard for 1.16.5). If it still crashes, verify that the Fabric API version matches the 1.16.5 game version.

Move the Wurst-Client-v7.15-MC1.16.5.jar file into the mods folder.