crash-2017-11-07_21.27.18-client.txt

Happened a few seconds after the world loaded (10 seconds at the most). There are a number of Blue Castle Runes and Blue shields placed within the loaded chunks. Otherwise, it is a freshly generated world other than some vanilla blocks and the Twilight Forest Portal. I imagine that's what caused it?

I hope this helps.

Crash log seems to be pointing at the Castle Brick Pillar. Does this crash still occur when you reload the world?