Hi, I am having an issue with the error described in the title which is causing me to load into vanilla minecraft when I set the modpack.jar to that latest 1.12.2 forge universal jar. I have made several modpacks with Technic and have only now found this error, I found one thread about it from 2015 but the OP never seemed to disclose the solution and I have checked all the things the admin said and none of them are the issue so I was wondering if anyone has any idea for how to fix this.