Players get timed out from my server (Pixelmon Reforged for 1.16.5 - 9.1.3)

[Zamudek]

As stated in the title, players get disconnected from my server a few seconds after entering the world, at the exact time they would select a starter pokemon. I assume it's the pixelmon mod causing issues, but I can't make out what exactly. I've already removed optifine as it spewed out a mirriad of error messages at server startup. It should be noted that despite all the errors, I'm always able to play, it's just that no one else can.

This is on forge version 36.2.34

I'll provide the logs to both the multiMC launcher and the server log, as both spew out various errors and warnings

multiMC log:https://paste.ee/p/m2ga1

Server log:https://paste.ee/p/2Xrlc

[ChampionAsh5357]

The version you are using is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

Currently supported versions are 1.19.3 (Latest), 1.19.2, and 1.18.2 (LTS).