Battleroid

Ok, thank you. Can you tell me why in particular or what is causing this if possible? Just for my sanity and so I can give the developer some information. I've been tearing my hair out trying to identify the issue the past few days.

I was hoping someone may be able to help me. I run a Forge server with ATG (Alternate Terrain Generation). I cannot explore new chunks; as soon as you (or any in-game player) come near a to-be generated chunk it instantly crashes and gives the same crash report every time. I cannot identify the issue. I can report that turning off monsters in the server configuration stops it from crashing, but only on new worlds, existing worlds crash regardless apparently. Why it stops it from crashing I do not know. What's odd is I can create a world on my personal computer with ATG seemingly fine. I've tried this in multiple configurations, including whittling down the number of mods to just ATG. Even then the problem still persisted. I've tried using different installations of Java this includes both OpenJDK and Oracle's. I am running the latest build of Forge on both the server and client. I've tried this both with MCPC+ and Forge. In MCPC+ I can generate new chunks with WorldBorder, but even then when I log into a new world it crashes. The crash report and log are here https://gist.github.com/Battleroid/529d9224c23aa0b4058e (lines 5396-5428 on the ForgeModLoader log). If more information is required please let me know. Any help is greatly appreciated.