https://pastebin.com/rPcxKKdE

@MackBaggins I can’t recreate this with a non-Magma client or server. Could you see if the same is true for you? If so, we may need to contact the Magma devs (or whoever’s involved) to ask about which versions of Forge libraries they’re using.

As discussed in the Discord server, Magma is using an old version of the fastutil library. Should be a reasonably simple fix on their side :)