• Minecraft: 1.12.2
• Forge: 14.23.5.2772
• Vampirism: 1.12.2-1.4.7

Appears to be a conflict between Just Enough Resources profiling code and Vampirism's village helper.

Create new world, stand near a village, run /profile 100

crash-2018-11-10_09.01.44-server.txt

Released 1.4.8 which should fix this issue