Illegal Packet Error on Multiplayer Modded Minecraft

[Uruso]

My friend and I are trying to play some multiplayer modded minecraft hosted on his computer and played over the same network. I keep getting disconnected with the error "Illegal Packet Received, Terminating Connection". It's not consistent with how long it takes for me to get booted from the game and the host doesn't seem to have any issues. We've tried both the latest version of forge and this version of forge. Thank you for any help you can provide.

Minecraft Version: 1.19.2
Forge Version: 43.1.43

My debug log:

https://www.dropbox.com/s/4fmzx8meaq8kari/Player latest log.log?dl=0

Host debug log:

https://www.dropbox.com/s/s37wostm3dmncj3/Host latest log.log?dl=0
 

 

[warjort]

One of your mods has broken networking code.

Mojang don't put these errors in the log by default. For us to see the error you will need to add the following property to your jvm arguments.

Quote

-Dforge.logging.mojang.level=debug

Since it looks you are using curseforge this in their minecraft settings. Beneath where you change the memory used.

For the server you change user_jvm_args.txt

 

But I also noticed you have hexerei. There is a known issue with the 1.19 version not working properly in multiplayer.

https://github.com/JoeFoxe/Hexerei-1.18/issues/56

[Uruso]

Thank you Warjort,

I won't be able to test your suggestions till this weekend but I'll definitely try removing Hexerei first and if it keeps happening I'll put in the jvm argument and get the updated logs.

[Uruso]

Alright, we tried both disabling Hexerei and putting the JVM argument in.
Here are the latest logs.

My debug log:

https://www.dropbox.com/s/mozf9vdvx45xjoz/Player latest log.log?dl=0

Host debug log:

https://www.dropbox.com/s/0y9v59bp6b1dgb9/Host latest log.log?dl=0

 

Thank you again for any help you can give.

 

[warjort]

Youd didn't post the debug.logs

Those are the latest.logs which doesn't show debug information.

Since it looks like you are using curseforge, you need to enable the forge debug.log in curseforge's minecraft settings.

 

Anyway, one of your logs contains this.

Quote

[19:14:46] [Netty Client IO #0/ERROR]: Received empty payload on channel create:main

Which looks like this create issue reported by somebody else: https://github.com/Creators-of-Create/Create/issues/3973

[Uruso]

I am sorry, I thought I had enabled it through the Minecraft launcher in the JVM Arguments as when I go through the profile options through Curseforge there is no entry field for JVM Arguments under where you change the memory settings. I will try to find a tutorial tomorrow.

Thank you again for the help you've been giving me.

[warjort]

The problem is you haven't told curseforge that it needs to enable the debug.log for forge.

It is a toggle button in the "advanced" section.

Curseforge calls the jvm arguments "additional arguments". It's at the very bottom.

 

Anyway, I think your problem is with the create mod, see the link to the issue I posted above.

You should be speaking to them on how to fix it.

 

If the issue is only with LAN games, you can try setting up a real server.