If you could update this to work with Minecraft 1.20.2 and higher versions that would be awesome, we're trying to play the latest pixelmon but it's hard to get the new curseforge updates on a server without this installer

Look into it, next time

Can you tell me, what is exactly not working with 1.20 or what is the Error @Logan9312

Tested with latest 1.20.4 and works with my latest Version.

Push this version next time, is with improved autoinstaller,
aswell a new System for detecting Internet-Connection and check for Version of the Script itself.