Game Crashing with very odd error code

Before i state my problem, im very sorry if i missed this in the faq, i dont understand much about this lol. So sorry if i missed the obvious 😂

I get this error code when launching a world or creating one.

The game crashed whilst exception in server tick loop
Error: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_3898 failed

I don't know what this means at all and once again sorry if i missed it somehwere.
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