Cec

Starting off, yes, I know 1.12 is no longer supported. This is just a really strange issue that has stumped me for the last few weeks and you're the only people who might know how to fix it. I build private packs for friends and I to use, and normally everything works fine, but recently we decided to update from 1.7.10 to 1.12.2, and an odd error popped up on one of the machines. The issue seems to be linked directly to the addition of Forge, as I've made sure the java versions between my computer and his are identical, and when trying to rebuild the pack from the ground up (I'm using MultiMC, so just created a new instance) and it launches fine up until I install forge. I've attached the full logs below in case there is information not in the spoiler. I don't know where I'm being stupid, any information that might point me in the right direction would be most appreciated. latest.log