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The game crashed whilst there was a severe problem during mod loading that has caused the game to fail
Error: net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Tesla Core Lib (teslacorelib)

are you missing the Tesla library?

Not sure, tell me where to find the lib

https://minecraft.curseforge.com/projects/tesla

I'm guessing he was missing the lib.