Geckolib and Discord Integration seem to be incompatible, because both mods use and include com.fasterxml.jackson.core as dependency. Both mods compile with shadowJar and relocate the related package, so I assume that it should actually not cause problems like this to happen. Opening this issue as I am looking for help solving this incompatibility.

The error message is java.lang.module.ResolutionException: Modules dcintegration and geckolib3 export package com.fasterxml.jackson.core to module gamemenumodoption

Related issue:
ErdbeerbaerLP/DiscordIntegration-Forge#344

Hmm that is a weird one since yeah it shouldn't be possible. I'll peak more her later

Also not compat with fancyDiscord

https://www.curseforge.com/minecraft/mc-mods/fancydiscord?comment=1

Server log-
https://gist.github.com/ProsperCraft/92cc7fd99ba3a117a44dbded4e8c8e09

I'm honestly confused as hell to how this is happening.

Open the jar file into any archive viewer, go to /META-INF/services/ and delete everything that starts with com.fasterxml.jackson.core.
Those service files should not work anymore since the classes it points to has a different name now. But is still enough to trigger java module conflicts. Maybe it can be excluded in the shade task?

@juanmuscaria we do it under packageSources but I'll throw it in shadowjar as well

Alright, that fixed it perfectly! I've pushed this change to all 1.15.2, 1.16.5, 1.17.1 of Forge and 1.16.5, 1.17.2, and 1.18 snapshot versions as well!

im having the same problem with other mod, could i ask how you managed to fix it? im not a developer, im just trying to find answers, im not being able to find much about "A and B export package C to module D"