Troubleshooting Steps
If you are experiencing game crashes, then this guide may solve your problems.
Contents
- Game crashes
- Mods not working
- How to edit config files
- Uninstalling the Mod Manager
- Other issues
> Game Crashes
If you are experiencing consistent game crashes, you can try the following:
Clear ModLoader
Sometimes, especially after a new update, MelonLoader fails to generate files that allow modding to work. To remedy this, you can try the following:
- Open the Mod Manager
- Click the settings cog (
) in the top left - Click the "Clear MelonLoader" button
- Restart the Mod Manager
Runtime config not found
If you get an error in the console along the lines of the below,
- Runtime config not found at: 'C:\path\to\ISMM\ModLoader\MelonLoader\net6\MelonLoader.runtimeconfig.json'
This means that MelonLoader was unable to download the necessary files to get modding to work.
To fix this, you can do the following:
- Open the ModLoader folder. You can do this by:
- Opening ISMM,
- Clicking on the three dots (
) - Click Open ISMM Folder, then open the ModLoader folder.
- Download the MelonLoader ZIP file.
- Open the downloaded file, then drag ALL contents into the folder from the step above.
- NOTE: If this step fails, it's likely that your anti-virus doesn't agree with MelonLoader, in that case it is recommended to add this file, and the ISMM ModLoader folder as an exception. You can read more about this here.
> Help! This mod isn't working!
You may come across times where a specific mod isn't working. Here's what to do:
- Make sure you are using the latest version of the affected mod.
- Check if the mod requires any buttons to be pressed to activate
- This is usually described on the Nexus Mods page, or exposed in the respective config file. - A game update may have broken the mod, in this case it will take some time for developers to update their mod to work with the latest version of the game.
- Most mods require Idle Slayer Mods Core to be installed. The mod manager usually prompts you, if you don't have this mod.

> How to edit config files
- Click the
Config Editor button (
) - Make changes to any config values for the mod you want to edit.
- Restart the game
> Uninstalling the Mod Manager
To uninstall the mod manager, do the following:
- Open the Mod Manager
- Click the settings cog (
) in the top left - Click on
Uninstall ISMM - You can now safely delete the app.
- Done!
> Other Issues
If your issue isn't listed here, feel free to join the Discord server.
- Alternatively, send me a message on Nexus Mods.
Important Information
ISMM uses a slightly modified version of MelonLoader that changes the base path to support this game. Some antivirus programs may flag it due to how MelonLoader injects code - this is a known false positive. The framework is open-source, and only path handling was changed - no malicious code is included.
You can read more about this [here]. If you prefer, you can install mods manually instead of using the Mod Manager.