Server Crash: Client-side class loaded on dedicated server

[Decryptu]

Description

The server crashed due to an attempt to load a client-side class on a dedicated server. This occurred while processing a TamedRat entity from the Rats mod.

Steps to Reproduce

1. Have a tamed rat in the game.
2. Apply the golem mount upgrade to the rat in a small place.
3. Exit the menu after applying the upgrade.
4. The server crashes instantly.

Environment

• Minecraft Version: 1.20.1
• Forge Version: 47.3.5
• Rats Mod Version: 1.20.1-8.1.2
• Server Type: Dedicated Server

Error Message

java.lang.RuntimeException: Attempted to load class com/github/alexthe666/citadel/client/model/AdvancedModelBox for invalid dist DEDICATED_SERVER

Crash report:

crash-2024-08-08_14.19.45-server.txt

[pucgenie]

Are you using Canary mod (contained in at least some Feed-the-Beast modpacks)? Then use this workaround from FTBTeam/FTB-Modpack-Issues#5525 : Remove Canary mod from server's mods/ folder.

[Decryptu]

indeed, canary-mc1.20.1-0.3.3.jar is in the server mods folder, I'll try that later

[GizmoTheMoonPig]

this is caused by canary, nothing I can really do about it. I recommend avoiding the mod as it causes many issues with rats