Fabric / Iris Crash: FileSystemException Invalid Argument (Windows Path on Linux)

What it looks like in the log

java.nio.file.FileSystemException: /mnt/transfer/Games/Minecraft/<duong-dan> Invalid argument

How to fix it

1. Open your Minecraft Launcher, go to the Installations tab, and delete the Iris profile that was originally created on Windows (and delete its matching `iris-fabric-loader-...` folder inside `.minecraft/versions/`).
2. Instead of sharing a standalone Iris profile across operating systems, install standard Fabric Loader and place the Iris and Sodium `.jar` files directly into `.minecraft/mods/`.
3. Alternatively, re-run the Iris Installer natively on Linux so it generates a valid Linux path for your installation.
4. If the Iris Installer fails to open a window on Linux (such as Fedora on Wayland), install the full OpenJDK package with GUI libraries instead of headless Java (e.g., `sudo dnf install java-21-openjdk`) and run the installer again.

Check your own log