The crash usually happens because of problems with the Java Runtime configuration, but there are other reasons too. Here’s how to fix the Exit Code 1 error on Minecraft.

Edit: Somehow forgot I was gonna mention that I am using version 2.0.0 of the mod on game version 1.16.5 and Fabric version 0.16.10. I don't think I have any mods which conflict with this one, but ...