[Bug]: Spawning any modded mob causes Connection Lost

[AlexFenlon]

OS

Windows

GPU

NVIDIA

Modpack (Optional)

No response

Game log

fml-client-latest.log
latest.log

Description

The game looses connection when a modded mob spawns.

This happens either when I load up a world, create new world or spawn a mob in an existing world.
I created a empty world, made a small platform of obsidian and spawned a vanilla mob onto it and it was fine, then spawned a modded mob onto it and crashed (tested with Zelda mod and other mods before narrowing it down). Any modded mob causes the game to exit the world and causes Shutting down internal server, then Connection lost and a fatal error has occured, this connection is terminated.

[AlexFenlon]

Edit: Config was edited, apologises!
Everything is back to normal once I reverted

# Extend DataWatcher IDs. Vanilla limit is 31, new limit is 127.
# Disabled by default because of uncertain/weak implementation (taken from NotEnoughIDs)
# [default: false]
B:extendDataWatcher=false

# Remove invalid (corrupted) blocks from the game. FOR DEBUGGING PURPOSES
# [default: false]
B:removeInvalidBlocks=false

# Throw an exception when an invalid block is registered. FOR DEBUGGING PURPOSES
# [default: false]
B:catchUnregisteredBlocks=false


I had these set as true and was causing the crash!