Turns out it was a conflict between a Forge version and Optifine.
Now, after pruning down my mods, I get the dreaded Exit Code: 1 message, my logs show mods i've uninstalled and a loader I got rid of, any fixes?
Log:
Honestly I don't know what mod was causing it, but I went through my mods slowly (split it in half, half again, slowly iterating until i found the culprits) until it worked.
Not sure what to say this is, but recently I started getting this error
when trying to mod MC, I cant find what mod is causing it and want to know if any of you know how to fix it.
Log (Github)