Duplicate stat id: "TranslatableComponent{key='stat.entityKill'
FNAFAThirceborn is using an ID added by another mod - the other mod is not mentioned
So maybe start with this mod and add the rest of the other mods one by one until you find the one, causing this issue
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Dude, you're a freaking genius!
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Wait... Why? I knew that it was not Java that was the problem, but it was at least ONE of the mods! Future me here, I deleted the mod that you asked about and it worked! The game is back on track!