Hey, I've been trying to get this to work for over a week now, and I figured I should post and ask for some help. What I'm trying to do is a little different than what this tutorial is for, in that I'm trying to contribute to a pre-existing mod, not create a new one. The mod in question is https://github.com/TechReborn/TechReborn, and while I got further using the "Advanced Initial Setup," I still can't get it working. What I've done is download the TechReborn package from github, run gradle to update dependencies and such, and then tried to follow the other directions. Unfortunately I'm stuck with an error "Could not find or load main class net.minecraft.launchwrapper.Launch." Is there some different process if I'm modifying an existing mod, instead of creating a new one?