Honestly almost 100% this is my fault. I've been adding mods to the New Game modpack, and until today it worked fine. I installed a couple new mods, and started getting crashes whenever I tried to start the game. I deleted all my new ones, but it's still not working.
I keep getting "java.lang.RuntimeException: One of more entry values did not copy to the correct id", I've tried every fix I can find for it but nothing is working. I've redownloaded Minecraft, Forge, Java, deleted my Log Folder, deleted my config folder, and still nothing is working. Any advice is appreciated. I have attached the crash log's paste bin below.
https://pastebin.com/H1gEZsjk