AxelCatto

It worked fine for 1.14.4, so I'm fully confused. I downloaded my original mods in May, and I've been adding a couple of mods every month since August. It broke in September.

I'm aware of that. I have separate folders for each version in my mods folder. Forge is a smart enough program to realize that a folder titled 1.12.2 is only for 1.12.2 and this has worked for me for almost half a year. That specific crash report was for my 1.12.2 version. Also, I get my mods from Curse.

Every time I try to start Forge (I use 1.12.2, 1.7.10, 1.10.2, 1.13.2 and 1.14.4) it crashes before even the Mojang screen comes up. Vanilla, Optifine, and Wurst work fine. There's the crash report: If anyone who is good at decoding crash reports can help me that would be great. Side note: I have no idea why it says "// You're mean.".