Startup Issue with Minecraft - Can't enter into the server

[Nerk]

System Information

Field	Value
Operating System	Linux - Debian GNU/Linux 12 on x86_64
Product	AMP ‘Phobos’ v2.6.3.2 (Mainline)
Virtualization	Docker
Application	Minecraft
Module	MinecraftModule
Running in Container	Yes
Current State	Ready

Problem Description

Issue

When i try to join i get this message:

Conexión perdida
Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: index 14, length: 105 (expected: range(0, 62))

Reproduction Steps

• I uploaded all my mods from the modpack to the server using filezilla.
• I selected the minecraft version (1.20.1) in server configurations.
• I tried to join the server and got this message.

[ThePotatoKing]

That may mean that the server doesn’t have the same mods as the client.
Take a look through this guide here to double-check if the server is properly configured.

Setting Up A Modded Java Minecraft Server

Preamble Minecraft is a bit notorious for being difficult to mod, given there’s oodles of different modloaders and versions to work with, there’s edge cases galore. If you’re new to the Minecraft modding scene and you’d like to know more about each modding platform and how they differ, check out this post here. 0. Create a new Minecraft Java Instance in AMP Easy as that, press the Create Instance button, then select Minecraft Java Edition from the drop-down. Feel free to use an existing instan…