Hi, I added Mobz to my modpack recently - https://www.curseforge.com/minecraft/modpacks/vagrant-saga

some users have reported on our discord they are getting the following crash everytime they try to log into the game. This is the 1.21.1 version on NeoForge (latest release)

crash log - https://pastebin.com/0bXQccQ7

I will have a look at this

I dont think the problem is related to this mod. To confirm this, use the exact version of Neoforge with minimum dependencies to run this mod, and then gradually adds back mods to see when the crash starts to happen.