Help identifying what mod is causing the crash. 1.16.5 Forge server.

[DJAWANNI]

When logging into the server, this error occurs:
Internal Exception: io.netty.handler.codec.DecoderException: io.netty.handler.codec.EncoderException: java.io.UTFDataFormatException: malformed input around byte 71(77, 1)
Here are the client logs:
https://mclo.gs/UHlptPN

[warjort]

Your error is a network protocol error. It typically does not tell you which mod caused the problem.

Those errors are usually caused by

* Mods that were never tested by the mod author in multiplayer

* Mods for different versions of minecraft

 

Usually the only way to find the problem mod is to experiment with removing mods until the problem goes away.

Backup your world before removing mods.

 

Getting this error is also an indication that you are developing your modpack in the wrong way.

* Do not just dump a large number of mods in your mods folder and expect it to work, it won't

* Add mods in small groups and test it. That way you will know which mods are causing problems, it is one of those you just added.

 

These are the mods that are modifying networking:

Quote

[imm_ptl:main,gokistats:main,hekate_lib:hekate_lib,concept4:main_simple_channel,concept0:main_simple_channel,heart_upgrade:heart_upgrade,concept8:main_simple_channel,flashnpcs:main,apocryphal_archive:net,enhancedcelestials:network,armorposer:main,cataclysm:main_channel,enigmaticlegacy:main,brickvariety:brickvariety,biggerstacks:rules,tiered:attribute_sync,concept3:main_simple_channel,damageindicator:damage_packet,dungeons_gear:network,offhandcombat:main,spawnermod:main,configuration:network_channel,infernalexp:main,concept7:main_simple_channel,collectorsalbum:network,stalwart_dungeons:stalwart_dungeons,mutantmore:main,mapmakingtools:channel,concept2:main_simple_channel,tinyredstone:tinyredstone,withoutaredstone:withoutaredstone,citadel:main_channel,playerex:path,concept6:main_simple_channel,upgradednetherite:main,curios:main,tiered:main_simple_channel,magic_merchant:magic_merchant,usefulbackpacks:curios,nonchantable:nonchantable,selene:network,concept1:main_simple_channel,supplementaries:network,patchouli:main,concept9:main_simple_channel,cyclic:main_channel,artifacts:main,ibeeditor:network,concept5:main_simple_channel,unionlib:main,prank_mod:prank_mod,geckolib3:main,duneons:duneons,dungeons_libraries:network]

But it could also be an issue with a mod having a broken custom recipe which won't appear in that list.

 

Finally, Minecraft 1.16 is no longer supported in this forum:

https://forums.minecraftforge.net/topic/91712-supported-version-directory/

This is the second time you have been told this.

Edited August 28, 2023 by warjort