A player on the server had Ae2 connected to the grinder for several days with only techguns gear whitelisted, then today the server started crashing every time the area is loaded.

techguns-1.12.2-2.0.2.0_pre3.1

Crash log - https://gist.github.com/ProsperCraft/fe6e9124002360111006f58e58a3f634

Here is another server crash with the same setup -
https://gist.github.com/ProsperCraft/6fb723b3f36796eb344e3b0044534a31