Unhandled exception.

[david-cueto]

I cannot log in to a server: (running it in a VPS running ubuntu 22.04)

You chose to run in offline mode.
Server IP :
Resolving play.doomland.xyz...
Found server play.doomland.xyz:25583 for domain play.doomland.xyz
Retrieving Server Info...
Server version : Doomland Network (protocol v763)
[MCC] Version is supported.
Logging in...
[MCC] Server is in offline mode.
[MCC] Server was successfully joined.
Type '/quit' to leave the server.

Unhandled exception. System.IO.InvalidDataException: Failed to process incoming packet of type JoinGame. (PacketID: 40, Protocol: 763, LoginPhase: False, InnerException: System.Collections.Generic.KeyNotFoundException).
---> System.Collections.Generic.KeyNotFoundException: The given key 'minecraft:chat_type' was not present in the dictionary.
at System.Collections.Generic.Dictionary2.get_Item(TKey key) at MinecraftClient.Protocol.Message.ChatParser.ReadChatType(Dictionary2 registryCodec)
at MinecraftClient.Protocol.Handlers.Protocol18Handler.HandlePacket(Int32 packetID, Queue1 packetData) --- End of inner exception stack trace --- at MinecraftClient.Protocol.Handlers.Protocol18Handler.HandlePacket(Int32 packetID, Queue1 packetData)
at MinecraftClient.Protocol.Handlers.Protocol18Handler.Updater(Object o)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
Aborted (core dumped)

[milutinke]

Which server software are you running?

[david-cueto]

[milutinke]

I meant like what server software, like Paper, or Spigot, or Vanilla?
And which version.

[david-cueto]

Oh sorry, 1.20.1 paper

[milutinke]

Oh sorry, 1.20.1 paper

Can you send me the ip on Discord?
I will need to manually debug this.
Discord: @guyonahorse

[david-cueto]

It's strange because if I do it from my PC, it works, but from the VPS it gives the error, maybe it's because of the VPS.

[milutinke]

Figured it out
It's a custom proxy implementation, it does not send the chat type to the client
I tested it with 1.16.4 and 1.19.4 it works