Encountered Client-Side NPE when joining modded server

[CA Akira]

Minecraft Version: 1.18.2

Forge Version: 40.1.84

Logs: Client: https://gist.github.com/Akiraca/04c52485839b0299b34486dceb943310 Server: https://mclo.gs/XM2BNi7 (please ignore the last part where the server runs into an error)

Image of the error message: 

Description of issue: Internal Exception: java.lang.NullPointerException: Cannot invoke "net.minecraft.network.protocol.Packet.m_5797_(net.minecraft.network.PacketListener)" because "packet" is null

Edited November 2, 2022 by CA Akira

[warjort]

One of your mods has broken networking code.

This is a list of all the mods that are creating custom channels.

Quote

[02:53:48] [Netty Client IO #1/ERROR]: Channels [blue_skies:main,structure_gel:main,guardvillagers:main,sophisticatedbackpacks:channel,toms_storage:main,redstonepen:default_ch,essentials:channel,minecraft:treechop-channel,constructionwand:main,worldstripper:network,diet:main,forge:tier_sorting,alexsmobs:main_channel,chiselsandbits:chiselsandbits,paraglider:master,kleeslabs:network,crafttweaker:main,blueprint:net,moreminecarts:example,create:main,createaddition:main,comforts:main,doubleslabs:main,carryon:carryonpackets,citadel:main_channel,create_confectionery:create_confectionery,curios:main,enchantwithmob:net,polymorph:main,selene:network,quark:main,damagetilt:main,supplementaries:network,sophisticatedcore:channel,geckolib3:main,twilightforest:channel] rejected vanilla connections

You should check you have the latest versions of these mods. And check if any of these have known issues,

 

You didn't post your debug.log so we can't see much else.

And Mojang's networking errors are logged at DEBUG. To see them you need to add the following property to your jvm arguments (same place you change the memory)

Quote

-Dforge.logging.mojang.level=debug

But I suspect it won't show which mod is causing the problem? Since this is a missing data issue there is probably no relevant information to log.

We might be able to work it out from previous messages in the log.

 

Failing that, you will need to experiment in a test/backup world with removing mods until you find the problem one.