Installing the Modpack on Modrinth

First, you need to download the unsup_setup script compatible with your system.
If you're on Windows, use this link.
If you're on Linux or MacOS, use this link.

Now, Create a new 1.20.1 Forge instance, and go to your settings page.

Then, move the unsup_setup file to your instance's .minecraft folder and run it. You can click the Folder button to open your instance's folder.

Scroll down in your settings page until you find the Java category. Click the Override global java arguments button, then put the following argument into your Java arguments field.

-javaagent:unsup.jar

Launch the game, and the modpack will automatically download itself and update on launch.