Player disconnecting/crashing by taking damage in modded 1.16.5 server

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    Hi, my friend and I are having a problem with our server. Apparently, everytime my friend takes damage by fire, lava, or by using fire resistance potions, we are both disconnected from the server, with this message: "internal exception Io.netty.handler.codec.EncoderException:java.lang.NullPointerException".


    Somehow, this doesn't happen when I take damage, only him.


    We're also using a few mods: Create, Tinkers Construct, Dungeons Gear/Plus/Libraries, Artifacts, Survive


    here are the logs if it helps: https://mclo.gs/aSAqk5w

    In the log I can see "Error encoding packet" but it doesn't show which mod caused the issue so try removing mod by mod