As the title suggests, we've been having this recurring issue on our server with 100+ mods. At first it could be hard to judge what's crashing it as the crash report linked below doesn't state anything specific apart from placing a feature, but the issue only ever happens when close to an Abyssal Chasm. Two separate instances of two different Abyssal Chasms yields the same result. Here is the crash report:
crash-2023-12-22_22.47.01-server.txt

If it helps, other generation mods we have installed are Twigs, BOP, Regions Unexplored, Underground Jungle and Ender's Cataclysm.

Twigs is incompatible with AC, along side etcetera.

dupe #84