Whenever I regenerate while running a LAN server the game crashes. This does not happen in single player nor does it happen when my friend regenerates.
Mod version: 3.0
Forge version: 1.12-14.23.5.2838
Log File: Not really sure what should go here, but once I figure it out will post.
Crash Report File:
crash-2020-11-26_19.20.42-client.txt

I think in total there has been only one instance where I have regenerated and the whole game hasn't crashed and that was the first time.

Edit 1 hour later: It now crashes when I regenerate in single player.
Error pop-up: The game crashed whilst ticking entity
Error: java.lang.IllegalArgumentException: bound must be positive
Exit Code: -1

Crash Log:
crash-2020-11-26_20.41.14-client.txt

Ensure you have skins in all folders