[Bug]: Server Error

[sal34]

What happened?

Many many of those type of error on 1.20.1:

..
[01:48:39] [Server thread/ERROR] [or.di.di.ne.ServerPacketHandler/]: java.lang.NullPointerException: Unknown message type! org.dimdev.dimdoors.network.packet.s2c.MonolithAggroParticlesPacket@690f1cda
[01:48:39] [Server thread/ERROR] [or.di.di.ne.ServerPacketHandler/]: java.lang.NullPointerException: Unknown message type! org.dimdev.dimdoors.network.packet.s2c.MonolithAggroParticlesPacket@deb53eb
[01:48:39] [Server thread/ERROR] [or.di.di.ne.ServerPacketHandler/]: java.lang.NullPointerException: Unknown message type! org.dimdev.dimdoors.network.packet.s2c.MonolithAggroParticlesPacket@3205dc03
[01:48:39] [Server thread/ERROR] [or.di.di.ne.ServerPacketHandler/]: java.lang.NullPointerException: Unknown message type! org.dimdev.dimdoors.network.packet.s2c.MonolithAggroParticlesPacket@7253db74
[01:48:39] [Server thread/ERROR] [or.di.di.ne.ServerPacketHandler/]: java.lang.NullPointerException: Unknown message type! org.dimdev.dimdoors.network.packet.s2c.MonolithAggroParticlesPacket@63abe028
..

Mod Version

5.3.3

What versions of Minecraft does this issue happen on?

No response

Log

No response

[twoface99]

Facing the same issue on my server. After some time this leads to a server crash.

[masuteri]

Still happens in 5.3.5. Leads to a server crash after a while, mainly after entering rifts