Minecraft: 1.20.1
Loader: Fabric 0.15.0
Fabric API: 0.91.0
PSWG: 0.0.109

I am getting this crash on launch. I did see in another post that Indium might be a problem so disabled it. Still getting a crash. Looks to be the same error with and without Indium.

Crash is before the MC window opens.

Crash Report: https://pastebin.com/umG2YmVg

Ah OK. thanks for the info. Only reason I have not gone to 1.20.2 yet is I am waiting for other mods. Might just have to suck it up and play w/o them LOL.

This is an issue with that particular version of Fabric Loader. I recommend you update to 1.20.2 with the latest version of everything, or else use Fabric Loader 0.14.22