https://mclo.gs/jzNKX5O
neoforge 1.21.1 .72

What makes you think this is related to placebo?

it says placebo at the end of code error, idk if its really related

Don't see any fatal issues related to Placebo, the player is being kicked because they're sending too many packets.

[26ott2024 21:13:31.596] [Server thread/INFO] [net.minecraft.server.network.ServerGamePacketListenerImpl/]: NatsuyamiOnArch lost connection: Internal Exception: io.netty.handler.codec.EncoderException: Packet too large: size 3107931 is over 8
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8743 | [26ott2024 21:13:31.597] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: NatsuyamiOnArch left the game

Try installing a mod like Packet Fixer to help with that kind of issue.

im already using that

wait, it disappeared lmao

Make sure it's installed on both client and server.

yeah, i might have deleted it for error when deleting client mods from the server

just started again the server, gonna see if it works