Crashing when logging into server in specific area.

When logging on to the server in the previous snapshot, I can play fine and so can everyone else, but when server runs in the new snapshot, everyone who is there crashes. It is very annoying. I thought it was us using the old stone slabs (please bring those back) that were replaced by marble blocks. I removed all of the stone slabs in the village by swiching back to previous snapshot. I then went back to the new snapshot and it still crashed. I have no idea what's going on and it's very annoying. The village uses most of the new blocks like Hoppers, trapped chests, redstone blocks, and more.
Here is my log: