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[Question] Forge: Unexpected custom data from client

Open code2497 opened this issue 3 years ago • 3 comments

Prerequisites

Console Client Version

Latest

Description of the Question

when i try to connect to a forge sever, my MCC show me that "Unexpected custom data from client". What should i do ?

Solutions you've already considered

No response

Attach screenshot here (If applicable)

image

Anythings that could help us answering the question

No response

Minecraft Version

1.16.5

Device

Desktop

Operating System

Windows

Server Address (If applicable)

gygk.f3322.net:30001

code2497 avatar Aug 19 '21 03:08 code2497

Similar issue #1727

ReinforceZwei avatar Aug 20 '21 10:08 ReinforceZwei

This is either a newer Forge version or an incompatible Forge mod. MCC can spoof mods to pass server login check, but not implement them correctly so the server-part of the mod can detect something is wrong with the client-part since it's not actually present in MCC, and kick the player.

Investigating a Forge protocol issue is quite involved and I've not got enough time for this at the moment.

ORelio avatar Aug 22 '21 15:08 ORelio

i am having the same issue one 1.19.2. right now. i have found that uninstalling and reinstalling the modpack (through curseforge) fixes the problem.

KooBaby avatar Apr 29 '23 12:04 KooBaby