Minecraft Crashes Just Before Loading Finishes

This is my first time using MCreator, so it makes sense that I would have problems. I finished my first element, exported, and loaded in my mod. It worked. Then I added a few more things like new sounds. I tried to load it in again and Minecraft exited with error code -1. I added a few more things and tried again, same thing happened. Then I thought it was the custom sounds, so I removed them and tried again. No difference. I can't figure it out. PLEASE HELP.